Finding the Fourth Proportional to 2,200.08, 3,301.20 and 2,128.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,200.08 : 3,301.20 = 2,128.80 : x
2. Step 2: Convert to fraction form
   2,200.08/3,301.20 = 2,128.80/x
3. Step 3: Cross multiply
   2,200.08x = 3,301.20 × 2,128.80
4. Step 4: Simplify right side
   2,200.08x = 7,027,594.56
5. Step 5: Solve for x
   x = 7,027,594.56/2,200.08
6. Step 6: Final answer
   x = 3,194.25