Finding the Fourth Proportional to 6,915.47, 9,543.35 and 3,931.23

Step by Step Solution

1. Step 1: Write the proportion equation
   6,915.47 : 9,543.35 = 3,931.23 : x
2. Step 2: Convert to fraction form
   6,915.47/9,543.35 = 3,931.23/x
3. Step 3: Cross multiply
   6,915.47x = 9,543.35 × 3,931.23
4. Step 4: Simplify right side
   6,915.47x = 37,517,103.82
5. Step 5: Solve for x
   x = 37,517,103.82/6,915.47
6. Step 6: Final answer
   x = 5,425.10