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Finding the Fourth Proportional to 413,855,978.40, 620,560,018.80 and 171,543,376.80

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Solution

The fourth proportional to 413,855,978.40, 620,560,018.80 and 171,543,376.80 is: 257,222,238.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,855,978.40 : 620,560,018.80 = 171,543,376.80 : x
  2. Step 2: Convert to fraction form
    413,855,978.40/620,560,018.80 = 171,543,376.80/x
  3. Step 3: Cross multiply
    413,855,978.40x = 620,560,018.80 × 171,543,376.80
  4. Step 4: Simplify right side
    413,855,978.40x = 106,452,961,132,023,488
  5. Step 5: Solve for x
    x = 106,452,961,132,023,488/413,855,978.40
  6. Step 6: Final answer
    x = 257,222,238.38

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