Finding the Fourth Proportional to 1,211.82, 1,818.09 and 563.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,211.82 : 1,818.09 = 563.10 : x
2. Step 2: Convert to fraction form
   1,211.82/1,818.09 = 563.10/x
3. Step 3: Cross multiply
   1,211.82x = 1,818.09 × 563.10
4. Step 4: Simplify right side
   1,211.82x = 1,023,766.48
5. Step 5: Solve for x
   x = 1,023,766.48/1,211.82
6. Step 6: Final answer
   x = 844.82