Finding the Fourth Proportional to 2,633.63, 3,950.84 and 990.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,633.63 : 3,950.84 = 990.29 : x
2. Step 2: Convert to fraction form
   2,633.63/3,950.84 = 990.29/x
3. Step 3: Cross multiply
   2,633.63x = 3,950.84 × 990.29
4. Step 4: Simplify right side
   2,633.63x = 3,912,457.59
5. Step 5: Solve for x
   x = 3,912,457.59/2,633.63
6. Step 6: Final answer
   x = 1,485.58