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Finding the Fourth Proportional to 42,471.54, 63,709.74 and 12,890.34

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Solution

The fourth proportional to 42,471.54, 63,709.74 and 12,890.34 is: 19,336.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,471.54 : 63,709.74 = 12,890.34 : x
  2. Step 2: Convert to fraction form
    42,471.54/63,709.74 = 12,890.34/x
  3. Step 3: Cross multiply
    42,471.54x = 63,709.74 × 12,890.34
  4. Step 4: Simplify right side
    42,471.54x = 821,240,209.91
  5. Step 5: Solve for x
    x = 821,240,209.91/42,471.54
  6. Step 6: Final answer
    x = 19,336.25

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