Finding the Fourth Proportional to 1,314.28, 1,813.57 and 810.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,314.28 : 1,813.57 = 810.06 : x
2. Step 2: Convert to fraction form
   1,314.28/1,813.57 = 810.06/x
3. Step 3: Cross multiply
   1,314.28x = 1,813.57 × 810.06
4. Step 4: Simplify right side
   1,314.28x = 1,469,100.51
5. Step 5: Solve for x
   x = 1,469,100.51/1,314.28
6. Step 6: Final answer
   x = 1,117.80