Finding the Third Proportional to 12,108 and 18,700.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,108 : 18,700.50 = 18,700.50 : x
2. Step 2: Convert to fraction form
   12,108/18,700.50 = 18,700.50/x
3. Step 3: Cross multiply
   12,108x = 18,700.50 × 18,700.50
4. Step 4: Simplify right side
   12,108x = 349,708,700.25
5. Step 5: Solve for x
   x = 349,708,700.25/12,108
6. Step 6: Final answer
   x = 28,882.45