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Finding the Fourth Proportional to 270,319.80, 405,598.40 and 128,267.78

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Solution

The fourth proportional to 270,319.80, 405,598.40 and 128,267.78 is: 192,457.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,319.80 : 405,598.40 = 128,267.78 : x
  2. Step 2: Convert to fraction form
    270,319.80/405,598.40 = 128,267.78/x
  3. Step 3: Cross multiply
    270,319.80x = 405,598.40 × 128,267.78
  4. Step 4: Simplify right side
    270,319.80x = 52,025,203,670.22
  5. Step 5: Solve for x
    x = 52,025,203,670.22/270,319.80
  6. Step 6: Final answer
    x = 192,457.98

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