Finding the Fourth Proportional to 2,452.24, 3,679.32 and 991.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,452.24 : 3,679.32 = 991.81 : x
2. Step 2: Convert to fraction form
   2,452.24/3,679.32 = 991.81/x
3. Step 3: Cross multiply
   2,452.24x = 3,679.32 × 991.81
4. Step 4: Simplify right side
   2,452.24x = 3,649,186.37
5. Step 5: Solve for x
   x = 3,649,186.37/2,452.24
6. Step 6: Final answer
   x = 1,488.10