Finding the Fourth Proportional to 8,737.20, 13,036.41 and 8,117.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,737.20 : 13,036.41 = 8,117.82 : x
2. Step 2: Convert to fraction form
   8,737.20/13,036.41 = 8,117.82/x
3. Step 3: Cross multiply
   8,737.20x = 13,036.41 × 8,117.82
4. Step 4: Simplify right side
   8,737.20x = 105,827,229.83
5. Step 5: Solve for x
   x = 105,827,229.83/8,737.20
6. Step 6: Final answer
   x = 12,112.26