Finding the Fourth Proportional to 2,271.69, 3,407.57 and 810.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,271.69 : 3,407.57 = 810.93 : x
2. Step 2: Convert to fraction form
   2,271.69/3,407.57 = 810.93/x
3. Step 3: Cross multiply
   2,271.69x = 3,407.57 × 810.93
4. Step 4: Simplify right side
   2,271.69x = 2,763,296.69
5. Step 5: Solve for x
   x = 2,763,296.69/2,271.69
6. Step 6: Final answer
   x = 1,216.41