Finding the Fourth Proportional to 9,411.59, 12,980.45 and 8,350.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,411.59 : 12,980.45 = 8,350.09 : x
2. Step 2: Convert to fraction form
   9,411.59/12,980.45 = 8,350.09/x
3. Step 3: Cross multiply
   9,411.59x = 12,980.45 × 8,350.09
4. Step 4: Simplify right side
   9,411.59x = 108,387,914.16
5. Step 5: Solve for x
   x = 108,387,914.16/9,411.59
6. Step 6: Final answer
   x = 11,516.43