Finding the Fourth Proportional to 2,657.50, 3,986.89 and 833.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,657.50 : 3,986.89 = 833.50 : x
2. Step 2: Convert to fraction form
   2,657.50/3,986.89 = 833.50/x
3. Step 3: Cross multiply
   2,657.50x = 3,986.89 × 833.50
4. Step 4: Simplify right side
   2,657.50x = 3,323,072.82
5. Step 5: Solve for x
   x = 3,323,072.82/2,657.50
6. Step 6: Final answer
   x = 1,250.45