Finding the Fourth Proportional to 2,613.60, 3,580.92 and 2,577.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.60 : 3,580.92 = 2,577.15 : x
2. Step 2: Convert to fraction form
   2,613.60/3,580.92 = 2,577.15/x
3. Step 3: Cross multiply
   2,613.60x = 3,580.92 × 2,577.15
4. Step 4: Simplify right side
   2,613.60x = 9,228,567.98
5. Step 5: Solve for x
   x = 9,228,567.98/2,613.60
6. Step 6: Final answer
   x = 3,530.98