Finding the Fourth Proportional to 1,152.62, 1,590.72 and 710.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.62 : 1,590.72 = 710.54 : x
2. Step 2: Convert to fraction form
   1,152.62/1,590.72 = 710.54/x
3. Step 3: Cross multiply
   1,152.62x = 1,590.72 × 710.54
4. Step 4: Simplify right side
   1,152.62x = 1,130,270.19
5. Step 5: Solve for x
   x = 1,130,270.19/1,152.62
6. Step 6: Final answer
   x = 980.61