Finding the Fourth Proportional to 2,208.42, 3,312.71 and 822.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,208.42 : 3,312.71 = 822.10 : x
2. Step 2: Convert to fraction form
   2,208.42/3,312.71 = 822.10/x
3. Step 3: Cross multiply
   2,208.42x = 3,312.71 × 822.10
4. Step 4: Simplify right side
   2,208.42x = 2,723,374.78
5. Step 5: Solve for x
   x = 2,723,374.78/2,208.42
6. Step 6: Final answer
   x = 1,233.18