Finding the Fourth Proportional to 2,250.95, 3,108.45 and 2,128.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,250.95 : 3,108.45 = 2,128.23 : x
2. Step 2: Convert to fraction form
   2,250.95/3,108.45 = 2,128.23/x
3. Step 3: Cross multiply
   2,250.95x = 3,108.45 × 2,128.23
4. Step 4: Simplify right side
   2,250.95x = 6,615,496.54
5. Step 5: Solve for x
   x = 6,615,496.54/2,250.95
6. Step 6: Final answer
   x = 2,938.99