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Finding the Fourth Proportional to 1,288,665, 1,778,253.60 and 744,836

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Solution

The fourth proportional to 1,288,665, 1,778,253.60 and 744,836 is: 1,027,813.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,665 : 1,778,253.60 = 744,836 : x
  2. Step 2: Convert to fraction form
    1,288,665/1,778,253.60 = 744,836/x
  3. Step 3: Cross multiply
    1,288,665x = 1,778,253.60 × 744,836
  4. Step 4: Simplify right side
    1,288,665x = 1,324,507,298,409.60
  5. Step 5: Solve for x
    x = 1,324,507,298,409.60/1,288,665
  6. Step 6: Final answer
    x = 1,027,813.51

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