Finding the Fourth Proportional to 2,271.42, 3,407.52 and 810.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,271.42 : 3,407.52 = 810.54 : x
2. Step 2: Convert to fraction form
   2,271.42/3,407.52 = 810.54/x
3. Step 3: Cross multiply
   2,271.42x = 3,407.52 × 810.54
4. Step 4: Simplify right side
   2,271.42x = 2,761,931.26
5. Step 5: Solve for x
   x = 2,761,931.26/2,271.42
6. Step 6: Final answer
   x = 1,215.95