Finding the Fourth Proportional to 12,387.88, 17,085.72 and 8,610.97

Step by Step Solution

1. Step 1: Write the proportion equation
   12,387.88 : 17,085.72 = 8,610.97 : x
2. Step 2: Convert to fraction form
   12,387.88/17,085.72 = 8,610.97/x
3. Step 3: Cross multiply
   12,387.88x = 17,085.72 × 8,610.97
4. Step 4: Simplify right side
   12,387.88x = 147,124,622.35
5. Step 5: Solve for x
   x = 147,124,622.35/12,387.88
6. Step 6: Final answer
   x = 11,876.50