Finding the Fourth Proportional to 1,152.43, 1,590.38 and 710.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.43 : 1,590.38 = 710.31 : x
2. Step 2: Convert to fraction form
   1,152.43/1,590.38 = 710.31/x
3. Step 3: Cross multiply
   1,152.43x = 1,590.38 × 710.31
4. Step 4: Simplify right side
   1,152.43x = 1,129,662.82
5. Step 5: Solve for x
   x = 1,129,662.82/1,152.43
6. Step 6: Final answer
   x = 980.24