Finding the Fourth Proportional to 2,271.66, 3,407.52 and 810.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,271.66 : 3,407.52 = 810.83 : x
2. Step 2: Convert to fraction form
   2,271.66/3,407.52 = 810.83/x
3. Step 3: Cross multiply
   2,271.66x = 3,407.52 × 810.83
4. Step 4: Simplify right side
   2,271.66x = 2,762,907.27
5. Step 5: Solve for x
   x = 2,762,907.27/2,271.66
6. Step 6: Final answer
   x = 1,216.25