Finding the Fourth Proportional to 8,438.72, 12,662.38 and 5,114.92

Step by Step Solution

1. Step 1: Write the proportion equation
   8,438.72 : 12,662.38 = 5,114.92 : x
2. Step 2: Convert to fraction form
   8,438.72/12,662.38 = 5,114.92/x
3. Step 3: Cross multiply
   8,438.72x = 12,662.38 × 5,114.92
4. Step 4: Simplify right side
   8,438.72x = 64,767,060.71
5. Step 5: Solve for x
   x = 64,767,060.71/8,438.72
6. Step 6: Final answer
   x = 7,674.99