Finding the Fourth Proportional to 1,251.91, 1,727.59 and 810.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,251.91 : 1,727.59 = 810.06 : x
2. Step 2: Convert to fraction form
   1,251.91/1,727.59 = 810.06/x
3. Step 3: Cross multiply
   1,251.91x = 1,727.59 × 810.06
4. Step 4: Simplify right side
   1,251.91x = 1,399,442.92
5. Step 5: Solve for x
   x = 1,399,442.92/1,251.91
6. Step 6: Final answer
   x = 1,117.85