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Finding the Fourth Proportional to 521,899.20, 720,208.70 and 307,053.10

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Solution

The fourth proportional to 521,899.20, 720,208.70 and 307,053.10 is: 423,726.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,899.20 : 720,208.70 = 307,053.10 : x
  2. Step 2: Convert to fraction form
    521,899.20/720,208.70 = 307,053.10/x
  3. Step 3: Cross multiply
    521,899.20x = 720,208.70 × 307,053.10
  4. Step 4: Simplify right side
    521,899.20x = 221,142,313,981.97
  5. Step 5: Solve for x
    x = 221,142,313,981.97/521,899.20
  6. Step 6: Final answer
    x = 423,726.10

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