Finding the Third Proportional to 12,421 and 18,462.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,421 : 18,462.50 = 18,462.50 : x
2. Step 2: Convert to fraction form
   12,421/18,462.50 = 18,462.50/x
3. Step 3: Cross multiply
   12,421x = 18,462.50 × 18,462.50
4. Step 4: Simplify right side
   12,421x = 340,863,906.25
5. Step 5: Solve for x
   x = 340,863,906.25/12,421
6. Step 6: Final answer
   x = 27,442.55