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Finding the Fourth Proportional to 820,498.72, 1,230,792.88 and 259,491.36

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Solution

The fourth proportional to 820,498.72, 1,230,792.88 and 259,491.36 is: 389,251.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,498.72 : 1,230,792.88 = 259,491.36 : x
  2. Step 2: Convert to fraction form
    820,498.72/1,230,792.88 = 259,491.36/x
  3. Step 3: Cross multiply
    820,498.72x = 1,230,792.88 × 259,491.36
  4. Step 4: Simplify right side
    820,498.72x = 319,380,118,309.52
  5. Step 5: Solve for x
    x = 319,380,118,309.52/820,498.72
  6. Step 6: Final answer
    x = 389,251.21

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