Finding the Fourth Proportional to 8,109.63, 12,160.12 and 2,486.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,109.63 : 12,160.12 = 2,486.31 : x
2. Step 2: Convert to fraction form
   8,109.63/12,160.12 = 2,486.31/x
3. Step 3: Cross multiply
   8,109.63x = 12,160.12 × 2,486.31
4. Step 4: Simplify right side
   8,109.63x = 30,233,827.96
5. Step 5: Solve for x
   x = 30,233,827.96/8,109.63
6. Step 6: Final answer
   x = 3,728.14