Finding the Fourth Proportional to 9,150.04, 12,617.80 and 8,138.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,150.04 : 12,617.80 = 8,138.56 : x
2. Step 2: Convert to fraction form
   9,150.04/12,617.80 = 8,138.56/x
3. Step 3: Cross multiply
   9,150.04x = 12,617.80 × 8,138.56
4. Step 4: Simplify right side
   9,150.04x = 102,690,722.37
5. Step 5: Solve for x
   x = 102,690,722.37/9,150.04
6. Step 6: Final answer
   x = 11,222.98