Finding the Third Proportional to 12,339 and 19,870.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,339 : 19,870.88 = 19,870.88 : x
2. Step 2: Convert to fraction form
   12,339/19,870.88 = 19,870.88/x
3. Step 3: Cross multiply
   12,339x = 19,870.88 × 19,870.88
4. Step 4: Simplify right side
   12,339x = 394,851,673.27
5. Step 5: Solve for x
   x = 394,851,673.27/12,339
6. Step 6: Final answer
   x = 32,000.30