Finding the Fourth Proportional to 1,868.22, 2,578.37 and 1,082.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.22 : 2,578.37 = 1,082.30 : x
2. Step 2: Convert to fraction form
   1,868.22/2,578.37 = 1,082.30/x
3. Step 3: Cross multiply
   1,868.22x = 2,578.37 × 1,082.30
4. Step 4: Simplify right side
   1,868.22x = 2,790,551.55
5. Step 5: Solve for x
   x = 2,790,551.55/1,868.22
6. Step 6: Final answer
   x = 1,493.70