Finding the Fourth Proportional to 1,251.72, 1,727.82 and 810.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,251.72 : 1,727.82 = 810.18 : x
2. Step 2: Convert to fraction form
   1,251.72/1,727.82 = 810.18/x
3. Step 3: Cross multiply
   1,251.72x = 1,727.82 × 810.18
4. Step 4: Simplify right side
   1,251.72x = 1,399,845.21
5. Step 5: Solve for x
   x = 1,399,845.21/1,251.72
6. Step 6: Final answer
   x = 1,118.34