Finding the Fourth Proportional to 12,617.76, 17,417.88 and 7,901.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,617.76 : 17,417.88 = 7,901.04 : x
2. Step 2: Convert to fraction form
   12,617.76/17,417.88 = 7,901.04/x
3. Step 3: Cross multiply
   12,617.76x = 17,417.88 × 7,901.04
4. Step 4: Simplify right side
   12,617.76x = 137,619,366.60
5. Step 5: Solve for x
   x = 137,619,366.60/12,617.76
6. Step 6: Final answer
   x = 10,906.80