Finding the Fourth Proportional to 2,574.42, 3,862.17 and 1,113.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,574.42 : 3,862.17 = 1,113.78 : x
2. Step 2: Convert to fraction form
   2,574.42/3,862.17 = 1,113.78/x
3. Step 3: Cross multiply
   2,574.42x = 3,862.17 × 1,113.78
4. Step 4: Simplify right side
   2,574.42x = 4,301,607.70
5. Step 5: Solve for x
   x = 4,301,607.70/2,574.42
6. Step 6: Final answer
   x = 1,670.90