Finding the Fourth Proportional to 8,085.31, 12,128.72 and 2,162.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,085.31 : 12,128.72 = 2,162.08 : x
2. Step 2: Convert to fraction form
   8,085.31/12,128.72 = 2,162.08/x
3. Step 3: Cross multiply
   8,085.31x = 12,128.72 × 2,162.08
4. Step 4: Simplify right side
   8,085.31x = 26,223,262.94
5. Step 5: Solve for x
   x = 26,223,262.94/8,085.31
6. Step 6: Final answer
   x = 3,243.32