Finding the Fourth Proportional to 2,120.57, 3,180.89 and 733.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.57 : 3,180.89 = 733.78 : x
2. Step 2: Convert to fraction form
   2,120.57/3,180.89 = 733.78/x
3. Step 3: Cross multiply
   2,120.57x = 3,180.89 × 733.78
4. Step 4: Simplify right side
   2,120.57x = 2,334,073.46
5. Step 5: Solve for x
   x = 2,334,073.46/2,120.57
6. Step 6: Final answer
   x = 1,100.68