Finding the Fourth Proportional to 12,713.60, 17,544.72 and 7,124.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,713.60 : 17,544.72 = 7,124.48 : x
2. Step 2: Convert to fraction form
   12,713.60/17,544.72 = 7,124.48/x
3. Step 3: Cross multiply
   12,713.60x = 17,544.72 × 7,124.48
4. Step 4: Simplify right side
   12,713.60x = 124,997,006.75
5. Step 5: Solve for x
   x = 124,997,006.75/12,713.60
6. Step 6: Final answer
   x = 9,831.76