Finding the Fourth Proportional to 8,635.86, 11,935.89 and 7,612.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,635.86 : 11,935.89 = 7,612.02 : x
2. Step 2: Convert to fraction form
   8,635.86/11,935.89 = 7,612.02/x
3. Step 3: Cross multiply
   8,635.86x = 11,935.89 × 7,612.02
4. Step 4: Simplify right side
   8,635.86x = 90,856,233.40
5. Step 5: Solve for x
   x = 90,856,233.40/8,635.86
6. Step 6: Final answer
   x = 10,520.81