Finding the Fourth Proportional to 2,451.24, 3,677.82 and 990.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,451.24 : 3,677.82 = 990.81 : x
2. Step 2: Convert to fraction form
   2,451.24/3,677.82 = 990.81/x
3. Step 3: Cross multiply
   2,451.24x = 3,677.82 × 990.81
4. Step 4: Simplify right side
   2,451.24x = 3,644,020.83
5. Step 5: Solve for x
   x = 3,644,020.83/2,451.24
6. Step 6: Final answer
   x = 1,486.60