Finding the Fourth Proportional to 2,577.78, 3,868.72 and 1,018.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.78 : 3,868.72 = 1,018.17 : x
2. Step 2: Convert to fraction form
   2,577.78/3,868.72 = 1,018.17/x
3. Step 3: Cross multiply
   2,577.78x = 3,868.72 × 1,018.17
4. Step 4: Simplify right side
   2,577.78x = 3,939,012.10
5. Step 5: Solve for x
   x = 3,939,012.10/2,577.78
6. Step 6: Final answer
   x = 1,528.06