Finding the Fourth Proportional to 2,577.87, 3,557.27 and 1,515.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.87 : 3,557.27 = 1,515.68 : x
2. Step 2: Convert to fraction form
   2,577.87/3,557.27 = 1,515.68/x
3. Step 3: Cross multiply
   2,577.87x = 3,557.27 × 1,515.68
4. Step 4: Simplify right side
   2,577.87x = 5,391,677.31
5. Step 5: Solve for x
   x = 5,391,677.31/2,577.87
6. Step 6: Final answer
   x = 2,091.52