Finding the Fourth Proportional to 2,613.89, 3,915.71 and 1,515.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.89 : 3,915.71 = 1,515.95 : x
2. Step 2: Convert to fraction form
   2,613.89/3,915.71 = 1,515.95/x
3. Step 3: Cross multiply
   2,613.89x = 3,915.71 × 1,515.95
4. Step 4: Simplify right side
   2,613.89x = 5,936,013.78
5. Step 5: Solve for x
   x = 5,936,013.78/2,613.89
6. Step 6: Final answer
   x = 2,270.95