Finding the Fourth Proportional to 11,398.59, 17,091.93 and 5,155.62

Step by Step Solution

1. Step 1: Write the proportion equation
   11,398.59 : 17,091.93 = 5,155.62 : x
2. Step 2: Convert to fraction form
   11,398.59/17,091.93 = 5,155.62/x
3. Step 3: Cross multiply
   11,398.59x = 17,091.93 × 5,155.62
4. Step 4: Simplify right side
   11,398.59x = 88,119,496.15
5. Step 5: Solve for x
   x = 88,119,496.15/11,398.59
6. Step 6: Final answer
   x = 7,730.74