Finding the Fourth Proportional to 12,360.86, 17,062.15 and 7,515.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,360.86 : 17,062.15 = 7,515.57 : x
2. Step 2: Convert to fraction form
   12,360.86/17,062.15 = 7,515.57/x
3. Step 3: Cross multiply
   12,360.86x = 17,062.15 × 7,515.57
4. Step 4: Simplify right side
   12,360.86x = 128,231,782.68
5. Step 5: Solve for x
   x = 128,231,782.68/12,360.86
6. Step 6: Final answer
   x = 10,374.02