Finding the Fourth Proportional to 1,033.63, 1,426.55 and 718.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,033.63 : 1,426.55 = 718.72 : x
2. Step 2: Convert to fraction form
   1,033.63/1,426.55 = 718.72/x
3. Step 3: Cross multiply
   1,033.63x = 1,426.55 × 718.72
4. Step 4: Simplify right side
   1,033.63x = 1,025,279.29
5. Step 5: Solve for x
   x = 1,025,279.29/1,033.63
6. Step 6: Final answer
   x = 991.93