Finding the Fourth Proportional to 12,606.72, 18,947.52 and 8,462.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,606.72 : 18,947.52 = 8,462.40 : x
2. Step 2: Convert to fraction form
   12,606.72/18,947.52 = 8,462.40/x
3. Step 3: Cross multiply
   12,606.72x = 18,947.52 × 8,462.40
4. Step 4: Simplify right side
   12,606.72x = 160,341,493.25
5. Step 5: Solve for x
   x = 160,341,493.25/12,606.72
6. Step 6: Final answer
   x = 12,718.73