Finding the Fourth Proportional to 8,238.56, 12,361.92 and 5,117.64

Step by Step Solution

1. Step 1: Write the proportion equation
   8,238.56 : 12,361.92 = 5,117.64 : x
2. Step 2: Convert to fraction form
   8,238.56/12,361.92 = 5,117.64/x
3. Step 3: Cross multiply
   8,238.56x = 12,361.92 × 5,117.64
4. Step 4: Simplify right side
   8,238.56x = 63,263,856.27
5. Step 5: Solve for x
   x = 63,263,856.27/8,238.56
6. Step 6: Final answer
   x = 7,678.99