Finding the Fourth Proportional to 2,391.89, 3,586.48 and 747.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.89 : 3,586.48 = 747.99 : x
2. Step 2: Convert to fraction form
   2,391.89/3,586.48 = 747.99/x
3. Step 3: Cross multiply
   2,391.89x = 3,586.48 × 747.99
4. Step 4: Simplify right side
   2,391.89x = 2,682,649.31
5. Step 5: Solve for x
   x = 2,682,649.31/2,391.89
6. Step 6: Final answer
   x = 1,121.56