Finding the Fourth Proportional to 6,613.49, 9,915.38 and 3,153.17

Step by Step Solution

1. Step 1: Write the proportion equation
   6,613.49 : 9,915.38 = 3,153.17 : x
2. Step 2: Convert to fraction form
   6,613.49/9,915.38 = 3,153.17/x
3. Step 3: Cross multiply
   6,613.49x = 9,915.38 × 3,153.17
4. Step 4: Simplify right side
   6,613.49x = 31,264,887.78
5. Step 5: Solve for x
   x = 31,264,887.78/6,613.49
6. Step 6: Final answer
   x = 4,727.44