Finding the Fourth Proportional to 2,280.90, 3,428.55 and 2,108.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.90 : 3,428.55 = 2,108.10 : x
2. Step 2: Convert to fraction form
   2,280.90/3,428.55 = 2,108.10/x
3. Step 3: Cross multiply
   2,280.90x = 3,428.55 × 2,108.10
4. Step 4: Simplify right side
   2,280.90x = 7,227,726.26
5. Step 5: Solve for x
   x = 7,227,726.26/2,280.90
6. Step 6: Final answer
   x = 3,168.80