Finding the Fourth Proportional to 1,047.71, 1,446.50 and 716.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.71 : 1,446.50 = 716.58 : x
2. Step 2: Convert to fraction form
   1,047.71/1,446.50 = 716.58/x
3. Step 3: Cross multiply
   1,047.71x = 1,446.50 × 716.58
4. Step 4: Simplify right side
   1,047.71x = 1,036,535.83
5. Step 5: Solve for x
   x = 1,036,535.83/1,047.71
6. Step 6: Final answer
   x = 989.33