Finding the Third Proportional to 12,439.50 and 16,890

Step by Step Solution

1. Step 1: Write the proportion equation
   12,439.50 : 16,890 = 16,890 : x
2. Step 2: Convert to fraction form
   12,439.50/16,890 = 16,890/x
3. Step 3: Cross multiply
   12,439.50x = 16,890 × 16,890
4. Step 4: Simplify right side
   12,439.50x = 285,272,100
5. Step 5: Solve for x
   x = 285,272,100/12,439.50
6. Step 6: Final answer
   x = 22,932.76