Finding the Fourth Proportional to 2,577.57, 3,556.98 and 1,515.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.57 : 3,556.98 = 1,515.35 : x
2. Step 2: Convert to fraction form
   2,577.57/3,556.98 = 1,515.35/x
3. Step 3: Cross multiply
   2,577.57x = 3,556.98 × 1,515.35
4. Step 4: Simplify right side
   2,577.57x = 5,390,051.86
5. Step 5: Solve for x
   x = 5,390,051.86/2,577.57
6. Step 6: Final answer
   x = 2,091.14