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Finding the Fourth Proportional to 42,783.52, 64,167.92 and 11,621.28

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Solution

The fourth proportional to 42,783.52, 64,167.92 and 11,621.28 is: 17,429.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,783.52 : 64,167.92 = 11,621.28 : x
  2. Step 2: Convert to fraction form
    42,783.52/64,167.92 = 11,621.28/x
  3. Step 3: Cross multiply
    42,783.52x = 64,167.92 × 11,621.28
  4. Step 4: Simplify right side
    42,783.52x = 745,713,365.34
  5. Step 5: Solve for x
    x = 745,713,365.34/42,783.52
  6. Step 6: Final answer
    x = 17,429.92

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