Finding the Fourth Proportional to 7,085.67, 10,628.55 and 2,155.29

Step by Step Solution

1. Step 1: Write the proportion equation
   7,085.67 : 10,628.55 = 2,155.29 : x
2. Step 2: Convert to fraction form
   7,085.67/10,628.55 = 2,155.29/x
3. Step 3: Cross multiply
   7,085.67x = 10,628.55 × 2,155.29
4. Step 4: Simplify right side
   7,085.67x = 22,907,607.53
5. Step 5: Solve for x
   x = 22,907,607.53/7,085.67
6. Step 6: Final answer
   x = 3,232.95