Finding the Fourth Proportional to 9,126.31, 12,582.90 and 7,616.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,126.31 : 12,582.90 = 7,616.05 : x
2. Step 2: Convert to fraction form
   9,126.31/12,582.90 = 7,616.05/x
3. Step 3: Cross multiply
   9,126.31x = 12,582.90 × 7,616.05
4. Step 4: Simplify right side
   9,126.31x = 95,831,995.55
5. Step 5: Solve for x
   x = 95,831,995.55/9,126.31
6. Step 6: Final answer
   x = 10,500.63