Finding the Third Proportional to 12,920.25 and 19,380.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,920.25 : 19,380.50 = 19,380.50 : x
2. Step 2: Convert to fraction form
   12,920.25/19,380.50 = 19,380.50/x
3. Step 3: Cross multiply
   12,920.25x = 19,380.50 × 19,380.50
4. Step 4: Simplify right side
   12,920.25x = 375,603,780.25
5. Step 5: Solve for x
   x = 375,603,780.25/12,920.25
6. Step 6: Final answer
   x = 29,070.94