Finding the Fourth Proportional to 1,868.10, 2,577.12 and 1,081.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.10 : 2,577.12 = 1,081.69 : x
2. Step 2: Convert to fraction form
   1,868.10/2,577.12 = 1,081.69/x
3. Step 3: Cross multiply
   1,868.10x = 2,577.12 × 1,081.69
4. Step 4: Simplify right side
   1,868.10x = 2,787,634.43
5. Step 5: Solve for x
   x = 2,787,634.43/1,868.10
6. Step 6: Final answer
   x = 1,492.23