Finding the Third Proportional to 12,126 and 18,724.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,126 : 18,724.50 = 18,724.50 : x
2. Step 2: Convert to fraction form
   12,126/18,724.50 = 18,724.50/x
3. Step 3: Cross multiply
   12,126x = 18,724.50 × 18,724.50
4. Step 4: Simplify right side
   12,126x = 350,606,900.25
5. Step 5: Solve for x
   x = 350,606,900.25/12,126
6. Step 6: Final answer
   x = 28,913.65