Finding the Fourth Proportional to 8,085.50, 12,128.24 and 2,539.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,085.50 : 12,128.24 = 2,539.27 : x
2. Step 2: Convert to fraction form
   8,085.50/12,128.24 = 2,539.27/x
3. Step 3: Cross multiply
   8,085.50x = 12,128.24 × 2,539.27
4. Step 4: Simplify right side
   8,085.50x = 30,796,875.98
5. Step 5: Solve for x
   x = 30,796,875.98/8,085.50
6. Step 6: Final answer
   x = 3,808.90