Finding the Fourth Proportional to 1,254.56, 1,730.71 and 812.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,254.56 : 1,730.71 = 812.61 : x
2. Step 2: Convert to fraction form
   1,254.56/1,730.71 = 812.61/x
3. Step 3: Cross multiply
   1,254.56x = 1,730.71 × 812.61
4. Step 4: Simplify right side
   1,254.56x = 1,406,392.25
5. Step 5: Solve for x
   x = 1,406,392.25/1,254.56
6. Step 6: Final answer
   x = 1,121.02