Finding the Fourth Proportional to 2,826.18, 4,221.41 and 2,388.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,826.18 : 4,221.41 = 2,388.78 : x
2. Step 2: Convert to fraction form
   2,826.18/4,221.41 = 2,388.78/x
3. Step 3: Cross multiply
   2,826.18x = 4,221.41 × 2,388.78
4. Step 4: Simplify right side
   2,826.18x = 10,084,007.84
5. Step 5: Solve for x
   x = 10,084,007.84/2,826.18
6. Step 6: Final answer
   x = 3,568.07