Finding the Fourth Proportional to 7,085.55, 10,629.87 and 2,155.59

Step by Step Solution

1. Step 1: Write the proportion equation
   7,085.55 : 10,629.87 = 2,155.59 : x
2. Step 2: Convert to fraction form
   7,085.55/10,629.87 = 2,155.59/x
3. Step 3: Cross multiply
   7,085.55x = 10,629.87 × 2,155.59
4. Step 4: Simplify right side
   7,085.55x = 22,913,641.47
5. Step 5: Solve for x
   x = 22,913,641.47/7,085.55
6. Step 6: Final answer
   x = 3,233.86