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Finding the Fourth Proportional to 643,908.80, 965,992.80 and 539,451.20

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Solution

The fourth proportional to 643,908.80, 965,992.80 and 539,451.20 is: 809,285.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,908.80 : 965,992.80 = 539,451.20 : x
  2. Step 2: Convert to fraction form
    643,908.80/965,992.80 = 539,451.20/x
  3. Step 3: Cross multiply
    643,908.80x = 965,992.80 × 539,451.20
  4. Step 4: Simplify right side
    643,908.80x = 521,105,975,151.36
  5. Step 5: Solve for x
    x = 521,105,975,151.36/643,908.80
  6. Step 6: Final answer
    x = 809,285.38

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