Finding the Third Proportional to 12,432 and 18,805.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,432 : 18,805.50 = 18,805.50 : x
2. Step 2: Convert to fraction form
   12,432/18,805.50 = 18,805.50/x
3. Step 3: Cross multiply
   12,432x = 18,805.50 × 18,805.50
4. Step 4: Simplify right side
   12,432x = 353,646,830.25
5. Step 5: Solve for x
   x = 353,646,830.25/12,432
6. Step 6: Final answer
   x = 28,446.50