Finding the Fourth Proportional to 1,151.87, 1,589.61 and 710.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.87 : 1,589.61 = 710.06 : x
2. Step 2: Convert to fraction form
   1,151.87/1,589.61 = 710.06/x
3. Step 3: Cross multiply
   1,151.87x = 1,589.61 × 710.06
4. Step 4: Simplify right side
   1,151.87x = 1,128,706.98
5. Step 5: Solve for x
   x = 1,128,706.98/1,151.87
6. Step 6: Final answer
   x = 979.90