Finding the Fourth Proportional to 1,108.58, 1,530.81 and 716.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,108.58 : 1,530.81 = 716.27 : x
2. Step 2: Convert to fraction form
   1,108.58/1,530.81 = 716.27/x
3. Step 3: Cross multiply
   1,108.58x = 1,530.81 × 716.27
4. Step 4: Simplify right side
   1,108.58x = 1,096,465.62
5. Step 5: Solve for x
   x = 1,096,465.62/1,108.58
6. Step 6: Final answer
   x = 989.08