Finding the Third Proportional to 12,471 and 17,788.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,471 : 17,788.50 = 17,788.50 : x
2. Step 2: Convert to fraction form
   12,471/17,788.50 = 17,788.50/x
3. Step 3: Cross multiply
   12,471x = 17,788.50 × 17,788.50
4. Step 4: Simplify right side
   12,471x = 316,430,732.25
5. Step 5: Solve for x
   x = 316,430,732.25/12,471
6. Step 6: Final answer
   x = 25,373.32