Finding the Fourth Proportional to 8,308.64, 12,414.38 and 8,018.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,308.64 : 12,414.38 = 8,018.06 : x
2. Step 2: Convert to fraction form
   8,308.64/12,414.38 = 8,018.06/x
3. Step 3: Cross multiply
   8,308.64x = 12,414.38 × 8,018.06
4. Step 4: Simplify right side
   8,308.64x = 99,539,141.54
5. Step 5: Solve for x
   x = 99,539,141.54/8,308.64
6. Step 6: Final answer
   x = 11,980.19