Finding the Fourth Proportional to 2,391.10, 3,586.59 and 748.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.10 : 3,586.59 = 748.42 : x
2. Step 2: Convert to fraction form
   2,391.10/3,586.59 = 748.42/x
3. Step 3: Cross multiply
   2,391.10x = 3,586.59 × 748.42
4. Step 4: Simplify right side
   2,391.10x = 2,684,275.69
5. Step 5: Solve for x
   x = 2,684,275.69/2,391.10
6. Step 6: Final answer
   x = 1,122.61