Finding the Fourth Proportional to 2,548.17, 3,515.27 and 1,615.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,548.17 : 3,515.27 = 1,615.05 : x
2. Step 2: Convert to fraction form
   2,548.17/3,515.27 = 1,615.05/x
3. Step 3: Cross multiply
   2,548.17x = 3,515.27 × 1,615.05
4. Step 4: Simplify right side
   2,548.17x = 5,677,328.74
5. Step 5: Solve for x
   x = 5,677,328.74/2,548.17
6. Step 6: Final answer
   x = 2,228.00