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Finding the Fourth Proportional to 212,907.47, 319,361.25 and 86,616.42

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Solution

The fourth proportional to 212,907.47, 319,361.25 and 86,616.42 is: 129,924.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,907.47 : 319,361.25 = 86,616.42 : x
  2. Step 2: Convert to fraction form
    212,907.47/319,361.25 = 86,616.42/x
  3. Step 3: Cross multiply
    212,907.47x = 319,361.25 × 86,616.42
  4. Step 4: Simplify right side
    212,907.47x = 27,661,928,161.73
  5. Step 5: Solve for x
    x = 27,661,928,161.73/212,907.47
  6. Step 6: Final answer
    x = 129,924.65

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