Finding the Third Proportional to 12,730.50 and 19,672.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,730.50 : 19,672.88 = 19,672.88 : x
2. Step 2: Convert to fraction form
   12,730.50/19,672.88 = 19,672.88/x
3. Step 3: Cross multiply
   12,730.50x = 19,672.88 × 19,672.88
4. Step 4: Simplify right side
   12,730.50x = 387,022,010.77
5. Step 5: Solve for x
   x = 387,022,010.77/12,730.50
6. Step 6: Final answer
   x = 30,401.16