Finding the Fourth Proportional to 1,108.76, 1,529.31 and 710.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,108.76 : 1,529.31 = 710.43 : x
2. Step 2: Convert to fraction form
   1,108.76/1,529.31 = 710.43/x
3. Step 3: Cross multiply
   1,108.76x = 1,529.31 × 710.43
4. Step 4: Simplify right side
   1,108.76x = 1,086,469.39
5. Step 5: Solve for x
   x = 1,086,469.39/1,108.76
6. Step 6: Final answer
   x = 979.89