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Finding the Fourth Proportional to 85,772.72, 128,695.80 and 35,864.48

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Solution

The fourth proportional to 85,772.72, 128,695.80 and 35,864.48 is: 53,812.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,772.72 : 128,695.80 = 35,864.48 : x
  2. Step 2: Convert to fraction form
    85,772.72/128,695.80 = 35,864.48/x
  3. Step 3: Cross multiply
    85,772.72x = 128,695.80 × 35,864.48
  4. Step 4: Simplify right side
    85,772.72x = 4,615,607,945.18
  5. Step 5: Solve for x
    x = 4,615,607,945.18/85,772.72
  6. Step 6: Final answer
    x = 53,812.07

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