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Finding the Fourth Proportional to 66,436.28, 99,637.44 and 19,678.22

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Solution

The fourth proportional to 66,436.28, 99,637.44 and 19,678.22 is: 29,512.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,436.28 : 99,637.44 = 19,678.22 : x
  2. Step 2: Convert to fraction form
    66,436.28/99,637.44 = 19,678.22/x
  3. Step 3: Cross multiply
    66,436.28x = 99,637.44 × 19,678.22
  4. Step 4: Simplify right side
    66,436.28x = 1,960,687,464.56
  5. Step 5: Solve for x
    x = 1,960,687,464.56/66,436.28
  6. Step 6: Final answer
    x = 29,512.30

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