Finding the Fourth Proportional to 1,862.61, 2,570.27 and 1,116.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,862.61 : 2,570.27 = 1,116.20 : x
2. Step 2: Convert to fraction form
   1,862.61/2,570.27 = 1,116.20/x
3. Step 3: Cross multiply
   1,862.61x = 2,570.27 × 1,116.20
4. Step 4: Simplify right side
   1,862.61x = 2,868,925.31
5. Step 5: Solve for x
   x = 2,868,925.31/1,862.61
6. Step 6: Final answer
   x = 1,540.27