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Finding the Fourth Proportional to 4,749.63, 7,124.64 and 1,286.88

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Solution

The fourth proportional to 4,749.63, 7,124.64 and 1,286.88 is: 1,930.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,749.63 : 7,124.64 = 1,286.88 : x
  2. Step 2: Convert to fraction form
    4,749.63/7,124.64 = 1,286.88/x
  3. Step 3: Cross multiply
    4,749.63x = 7,124.64 × 1,286.88
  4. Step 4: Simplify right side
    4,749.63x = 9,168,556.72
  5. Step 5: Solve for x
    x = 9,168,556.72/4,749.63
  6. Step 6: Final answer
    x = 1,930.37

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