Finding the Fourth Proportional to 2,938.78, 4,053.24 and 2,622.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,938.78 : 4,053.24 = 2,622.58 : x
2. Step 2: Convert to fraction form
   2,938.78/4,053.24 = 2,622.58/x
3. Step 3: Cross multiply
   2,938.78x = 4,053.24 × 2,622.58
4. Step 4: Simplify right side
   2,938.78x = 10,629,936.03
5. Step 5: Solve for x
   x = 10,629,936.03/2,938.78
6. Step 6: Final answer
   x = 3,617.12