Finding the Fourth Proportional to 12,116.60, 16,737.90 and 9,357.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,116.60 : 16,737.90 = 9,357.56 : x
2. Step 2: Convert to fraction form
   12,116.60/16,737.90 = 9,357.56/x
3. Step 3: Cross multiply
   12,116.60x = 16,737.90 × 9,357.56
4. Step 4: Simplify right side
   12,116.60x = 156,625,903.52
5. Step 5: Solve for x
   x = 156,625,903.52/12,116.60
6. Step 6: Final answer
   x = 12,926.56