Finding the Fourth Proportional to 11,411.87, 17,117.51 and 5,167.35

Step by Step Solution

1. Step 1: Write the proportion equation
   11,411.87 : 17,117.51 = 5,167.35 : x
2. Step 2: Convert to fraction form
   11,411.87/17,117.51 = 5,167.35/x
3. Step 3: Cross multiply
   11,411.87x = 17,117.51 × 5,167.35
4. Step 4: Simplify right side
   11,411.87x = 88,452,139.46
5. Step 5: Solve for x
   x = 88,452,139.46/11,411.87
6. Step 6: Final answer
   x = 7,750.89