Finding the Fourth Proportional to 1,123.57, 1,549.65 and 730.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.57 : 1,549.65 = 730.72 : x
2. Step 2: Convert to fraction form
   1,123.57/1,549.65 = 730.72/x
3. Step 3: Cross multiply
   1,123.57x = 1,549.65 × 730.72
4. Step 4: Simplify right side
   1,123.57x = 1,132,360.25
5. Step 5: Solve for x
   x = 1,132,360.25/1,123.57
6. Step 6: Final answer
   x = 1,007.82