Finding the Fourth Proportional to 2,178.52, 3,269.20 and 810.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.52 : 3,269.20 = 810.52 : x
2. Step 2: Convert to fraction form
   2,178.52/3,269.20 = 810.52/x
3. Step 3: Cross multiply
   2,178.52x = 3,269.20 × 810.52
4. Step 4: Simplify right side
   2,178.52x = 2,649,751.98
5. Step 5: Solve for x
   x = 2,649,751.98/2,178.52
6. Step 6: Final answer
   x = 1,216.31