Finding the Fourth Proportional to 12,439.52, 17,166.72 and 7,134.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,439.52 : 17,166.72 = 7,134.83 : x
2. Step 2: Convert to fraction form
   12,439.52/17,166.72 = 7,134.83/x
3. Step 3: Cross multiply
   12,439.52x = 17,166.72 × 7,134.83
4. Step 4: Simplify right side
   12,439.52x = 122,481,628.86
5. Step 5: Solve for x
   x = 122,481,628.86/12,439.52
6. Step 6: Final answer
   x = 9,846.17