Finding the Fourth Proportional to 2,633.89, 3,950.52 and 686.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,633.89 : 3,950.52 = 686.25 : x
2. Step 2: Convert to fraction form
   2,633.89/3,950.52 = 686.25/x
3. Step 3: Cross multiply
   2,633.89x = 3,950.52 × 686.25
4. Step 4: Simplify right side
   2,633.89x = 2,711,044.35
5. Step 5: Solve for x
   x = 2,711,044.35/2,633.89
6. Step 6: Final answer
   x = 1,029.29