Finding the Fourth Proportional to 2,633.49, 3,950.91 and 990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,633.49 : 3,950.91 = 990.50 : x
2. Step 2: Convert to fraction form
   2,633.49/3,950.91 = 990.50/x
3. Step 3: Cross multiply
   2,633.49x = 3,950.91 × 990.50
4. Step 4: Simplify right side
   2,633.49x = 3,913,356.60
5. Step 5: Solve for x
   x = 3,913,356.60/2,633.49
6. Step 6: Final answer
   x = 1,486.00