Finding the Third Proportional to 12,431 and 17,380.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,431 : 17,380.50 = 17,380.50 : x
2. Step 2: Convert to fraction form
   12,431/17,380.50 = 17,380.50/x
3. Step 3: Cross multiply
   12,431x = 17,380.50 × 17,380.50
4. Step 4: Simplify right side
   12,431x = 302,081,780.25
5. Step 5: Solve for x
   x = 302,081,780.25/12,431
6. Step 6: Final answer
   x = 24,300.68