Finding the Fourth Proportional to 1,152.48, 1,590.96 and 738.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.48 : 1,590.96 = 738.72 : x
2. Step 2: Convert to fraction form
   1,152.48/1,590.96 = 738.72/x
3. Step 3: Cross multiply
   1,152.48x = 1,590.96 × 738.72
4. Step 4: Simplify right side
   1,152.48x = 1,175,273.97
5. Step 5: Solve for x
   x = 1,175,273.97/1,152.48
6. Step 6: Final answer
   x = 1,019.78