Finding the Fourth Proportional to 11,679.76, 17,517.81 and 5,104.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,679.76 : 17,517.81 = 5,104.18 : x
2. Step 2: Convert to fraction form
   11,679.76/17,517.81 = 5,104.18/x
3. Step 3: Cross multiply
   11,679.76x = 17,517.81 × 5,104.18
4. Step 4: Simplify right side
   11,679.76x = 89,414,055.45
5. Step 5: Solve for x
   x = 89,414,055.45/11,679.76
6. Step 6: Final answer
   x = 7,655.47