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Finding the Fourth Proportional to 428,777.42, 643,551.62 and 229,268.34

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Solution

The fourth proportional to 428,777.42, 643,551.62 and 229,268.34 is: 344,108.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,777.42 : 643,551.62 = 229,268.34 : x
  2. Step 2: Convert to fraction form
    428,777.42/643,551.62 = 229,268.34/x
  3. Step 3: Cross multiply
    428,777.42x = 643,551.62 × 229,268.34
  4. Step 4: Simplify right side
    428,777.42x = 147,546,010,475.37
  5. Step 5: Solve for x
    x = 147,546,010,475.37/428,777.42
  6. Step 6: Final answer
    x = 344,108.63

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