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Finding the Fourth Proportional to 57,921.75, 86,889.51 and 20,474.10

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Solution

The fourth proportional to 57,921.75, 86,889.51 and 20,474.10 is: 30,713.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,921.75 : 86,889.51 = 20,474.10 : x
  2. Step 2: Convert to fraction form
    57,921.75/86,889.51 = 20,474.10/x
  3. Step 3: Cross multiply
    57,921.75x = 86,889.51 × 20,474.10
  4. Step 4: Simplify right side
    57,921.75x = 1,778,984,516.69
  5. Step 5: Solve for x
    x = 1,778,984,516.69/57,921.75
  6. Step 6: Final answer
    x = 30,713.58

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