Finding the Fourth Proportional to 1,152.45, 1,589.61 and 710.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.45 : 1,589.61 = 710.49 : x
2. Step 2: Convert to fraction form
   1,152.45/1,589.61 = 710.49/x
3. Step 3: Cross multiply
   1,152.45x = 1,589.61 × 710.49
4. Step 4: Simplify right side
   1,152.45x = 1,129,402.01
5. Step 5: Solve for x
   x = 1,129,402.01/1,152.45
6. Step 6: Final answer
   x = 980.00