Finding the Fourth Proportional to 2,138.78, 2,953.55 and 2,022.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,138.78 : 2,953.55 = 2,022.29 : x
2. Step 2: Convert to fraction form
   2,138.78/2,953.55 = 2,022.29/x
3. Step 3: Cross multiply
   2,138.78x = 2,953.55 × 2,022.29
4. Step 4: Simplify right side
   2,138.78x = 5,972,931.90
5. Step 5: Solve for x
   x = 5,972,931.90/2,138.78
6. Step 6: Final answer
   x = 2,792.69