Finding the Fourth Proportional to 3,921.39, 5,411.57 and 2,242.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.39 : 5,411.57 = 2,242.78 : x
2. Step 2: Convert to fraction form
   3,921.39/5,411.57 = 2,242.78/x
3. Step 3: Cross multiply
   3,921.39x = 5,411.57 × 2,242.78
4. Step 4: Simplify right side
   3,921.39x = 12,136,936.22
5. Step 5: Solve for x
   x = 12,136,936.22/3,921.39
6. Step 6: Final answer
   x = 3,095.06