Finding the Fourth Proportional to 6,895.53, 9,515.55 and 3,911.30

Step by Step Solution

1. Step 1: Write the proportion equation
   6,895.53 : 9,515.55 = 3,911.30 : x
2. Step 2: Convert to fraction form
   6,895.53/9,515.55 = 3,911.30/x
3. Step 3: Cross multiply
   6,895.53x = 9,515.55 × 3,911.30
4. Step 4: Simplify right side
   6,895.53x = 37,218,108.47
5. Step 5: Solve for x
   x = 37,218,108.47/6,895.53
6. Step 6: Final answer
   x = 5,397.43