Finding the Fourth Proportional to 11,718.32, 17,571.18 and 5,136.86

Step by Step Solution

1. Step 1: Write the proportion equation
   11,718.32 : 17,571.18 = 5,136.86 : x
2. Step 2: Convert to fraction form
   11,718.32/17,571.18 = 5,136.86/x
3. Step 3: Cross multiply
   11,718.32x = 17,571.18 × 5,136.86
4. Step 4: Simplify right side
   11,718.32x = 90,260,691.69
5. Step 5: Solve for x
   x = 90,260,691.69/11,718.32
6. Step 6: Final answer
   x = 7,702.53