Finding the Fourth Proportional to 1,868.24, 2,578.56 and 1,168.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.24 : 2,578.56 = 1,168.40 : x
2. Step 2: Convert to fraction form
   1,868.24/2,578.56 = 1,168.40/x
3. Step 3: Cross multiply
   1,868.24x = 2,578.56 × 1,168.40
4. Step 4: Simplify right side
   1,868.24x = 3,012,789.50
5. Step 5: Solve for x
   x = 3,012,789.50/1,868.24
6. Step 6: Final answer
   x = 1,612.64