Finding the Fourth Proportional to 12,380.60, 17,086.02 and 8,181.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,380.60 : 17,086.02 = 8,181.56 : x
2. Step 2: Convert to fraction form
   12,380.60/17,086.02 = 8,181.56/x
3. Step 3: Cross multiply
   12,380.60x = 17,086.02 × 8,181.56
4. Step 4: Simplify right side
   12,380.60x = 139,790,297.79
5. Step 5: Solve for x
   x = 139,790,297.79/12,380.60
6. Step 6: Final answer
   x = 11,291.08