Finding the Third Proportional to 12,478.50 and 16,611.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,478.50 : 16,611.75 = 16,611.75 : x
2. Step 2: Convert to fraction form
   12,478.50/16,611.75 = 16,611.75/x
3. Step 3: Cross multiply
   12,478.50x = 16,611.75 × 16,611.75
4. Step 4: Simplify right side
   12,478.50x = 275,950,238.06
5. Step 5: Solve for x
   x = 275,950,238.06/12,478.50
6. Step 6: Final answer
   x = 22,114.06