Finding the Fourth Proportional to 1,233.50, 1,839.78 and 1,039.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,233.50 : 1,839.78 = 1,039.77 : x
2. Step 2: Convert to fraction form
   1,233.50/1,839.78 = 1,039.77/x
3. Step 3: Cross multiply
   1,233.50x = 1,839.78 × 1,039.77
4. Step 4: Simplify right side
   1,233.50x = 1,912,948.05
5. Step 5: Solve for x
   x = 1,912,948.05/1,233.50
6. Step 6: Final answer
   x = 1,550.84