Finding the Fourth Proportional to 1,868.30, 2,578.48 and 1,112.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.30 : 2,578.48 = 1,112.45 : x
2. Step 2: Convert to fraction form
   1,868.30/2,578.48 = 1,112.45/x
3. Step 3: Cross multiply
   1,868.30x = 2,578.48 × 1,112.45
4. Step 4: Simplify right side
   1,868.30x = 2,868,439.30
5. Step 5: Solve for x
   x = 2,868,439.30/1,868.30
6. Step 6: Final answer
   x = 1,535.32