Finding the Fourth Proportional to 9,861.30, 13,607.37 and 5,612.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,861.30 : 13,607.37 = 5,612.91 : x
2. Step 2: Convert to fraction form
   9,861.30/13,607.37 = 5,612.91/x
3. Step 3: Cross multiply
   9,861.30x = 13,607.37 × 5,612.91
4. Step 4: Simplify right side
   9,861.30x = 76,376,943.15
5. Step 5: Solve for x
   x = 76,376,943.15/9,861.30
6. Step 6: Final answer
   x = 7,745.12