Finding the Fourth Proportional to 7,085.72, 10,628.22 and 2,155.25

Step by Step Solution

1. Step 1: Write the proportion equation
   7,085.72 : 10,628.22 = 2,155.25 : x
2. Step 2: Convert to fraction form
   7,085.72/10,628.22 = 2,155.25/x
3. Step 3: Cross multiply
   7,085.72x = 10,628.22 × 2,155.25
4. Step 4: Simplify right side
   7,085.72x = 22,906,471.16
5. Step 5: Solve for x
   x = 22,906,471.16/7,085.72
6. Step 6: Final answer
   x = 3,232.77