Finding the Third Proportional to 12,114 and 18,721.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,114 : 18,721.50 = 18,721.50 : x
2. Step 2: Convert to fraction form
   12,114/18,721.50 = 18,721.50/x
3. Step 3: Cross multiply
   12,114x = 18,721.50 × 18,721.50
4. Step 4: Simplify right side
   12,114x = 350,494,562.25
5. Step 5: Solve for x
   x = 350,494,562.25/12,114
6. Step 6: Final answer
   x = 28,933.02