Finding the Fourth Proportional to 3,498.71, 5,237.15 and 2,615.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,498.71 : 5,237.15 = 2,615.99 : x
2. Step 2: Convert to fraction form
   3,498.71/5,237.15 = 2,615.99/x
3. Step 3: Cross multiply
   3,498.71x = 5,237.15 × 2,615.99
4. Step 4: Simplify right side
   3,498.71x = 13,700,292.76
5. Step 5: Solve for x
   x = 13,700,292.76/3,498.71
6. Step 6: Final answer
   x = 3,915.82