Finding the Fourth Proportional to 7,085.25, 10,628.31 and 2,155.25

Step by Step Solution

1. Step 1: Write the proportion equation
   7,085.25 : 10,628.31 = 2,155.25 : x
2. Step 2: Convert to fraction form
   7,085.25/10,628.31 = 2,155.25/x
3. Step 3: Cross multiply
   7,085.25x = 10,628.31 × 2,155.25
4. Step 4: Simplify right side
   7,085.25x = 22,906,699.78
5. Step 5: Solve for x
   x = 22,906,699.78/7,085.25
6. Step 6: Final answer
   x = 3,233.01