Finding the Fourth Proportional to 2,838.72, 4,254.15 and 2,420.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,838.72 : 4,254.15 = 2,420.07 : x
2. Step 2: Convert to fraction form
   2,838.72/4,254.15 = 2,420.07/x
3. Step 3: Cross multiply
   2,838.72x = 4,254.15 × 2,420.07
4. Step 4: Simplify right side
   2,838.72x = 10,295,340.79
5. Step 5: Solve for x
   x = 10,295,340.79/2,838.72
6. Step 6: Final answer
   x = 3,626.75