Finding the Fourth Proportional to 2,635.73, 3,952.98 and 991.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.73 : 3,952.98 = 991.83 : x
2. Step 2: Convert to fraction form
   2,635.73/3,952.98 = 991.83/x
3. Step 3: Cross multiply
   2,635.73x = 3,952.98 × 991.83
4. Step 4: Simplify right side
   2,635.73x = 3,920,684.15
5. Step 5: Solve for x
   x = 3,920,684.15/2,635.73
6. Step 6: Final answer
   x = 1,487.51