Finding the Fourth Proportional to 1,128.38, 1,690.83 and 716.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.38 : 1,690.83 = 716.24 : x
2. Step 2: Convert to fraction form
   1,128.38/1,690.83 = 716.24/x
3. Step 3: Cross multiply
   1,128.38x = 1,690.83 × 716.24
4. Step 4: Simplify right side
   1,128.38x = 1,211,044.31
5. Step 5: Solve for x
   x = 1,211,044.31/1,128.38
6. Step 6: Final answer
   x = 1,073.26