Finding the Fourth Proportional to 1,034.40, 1,426.56 and 810.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,034.40 : 1,426.56 = 810.96 : x
2. Step 2: Convert to fraction form
   1,034.40/1,426.56 = 810.96/x
3. Step 3: Cross multiply
   1,034.40x = 1,426.56 × 810.96
4. Step 4: Simplify right side
   1,034.40x = 1,156,883.10
5. Step 5: Solve for x
   x = 1,156,883.10/1,034.40
6. Step 6: Final answer
   x = 1,118.41