Finding the Fourth Proportional to 11,648.56, 17,480.40 and 5,078.92

Step by Step Solution

1. Step 1: Write the proportion equation
   11,648.56 : 17,480.40 = 5,078.92 : x
2. Step 2: Convert to fraction form
   11,648.56/17,480.40 = 5,078.92/x
3. Step 3: Cross multiply
   11,648.56x = 17,480.40 × 5,078.92
4. Step 4: Simplify right side
   11,648.56x = 88,781,553.17
5. Step 5: Solve for x
   x = 88,781,553.17/11,648.56
6. Step 6: Final answer
   x = 7,621.68