Finding the Fourth Proportional to 6,915.54, 9,543.69 and 3,931.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,915.54 : 9,543.69 = 3,931.50 : x
2. Step 2: Convert to fraction form
   6,915.54/9,543.69 = 3,931.50/x
3. Step 3: Cross multiply
   6,915.54x = 9,543.69 × 3,931.50
4. Step 4: Simplify right side
   6,915.54x = 37,521,017.24
5. Step 5: Solve for x
   x = 37,521,017.24/6,915.54
6. Step 6: Final answer
   x = 5,425.61