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Finding the Fourth Proportional to 21,122.91, 29,144.43 and 12,944.28

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Solution

The fourth proportional to 21,122.91, 29,144.43 and 12,944.28 is: 17,859.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.91 : 29,144.43 = 12,944.28 : x
  2. Step 2: Convert to fraction form
    21,122.91/29,144.43 = 12,944.28/x
  3. Step 3: Cross multiply
    21,122.91x = 29,144.43 × 12,944.28
  4. Step 4: Simplify right side
    21,122.91x = 377,253,662.36
  5. Step 5: Solve for x
    x = 377,253,662.36/21,122.91
  6. Step 6: Final answer
    x = 17,859.93

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