Finding the Third Proportional to 12,478.50 and 18,847.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,478.50 : 18,847.69 = 18,847.69 : x
2. Step 2: Convert to fraction form
   12,478.50/18,847.69 = 18,847.69/x
3. Step 3: Cross multiply
   12,478.50x = 18,847.69 × 18,847.69
4. Step 4: Simplify right side
   12,478.50x = 355,235,324.10
5. Step 5: Solve for x
   x = 355,235,324.10/12,478.50
6. Step 6: Final answer
   x = 28,467.79