Finding the Third Proportional to 19,720 and 28,812

Step by Step Solution

1. Step 1: Write the proportion equation
   19,720 : 28,812 = 28,812 : x
2. Step 2: Convert to fraction form
   19,720/28,812 = 28,812/x
3. Step 3: Cross multiply
   19,720x = 28,812 × 28,812
4. Step 4: Simplify right side
   19,720x = 830,131,344
5. Step 5: Solve for x
   x = 830,131,344/19,720
6. Step 6: Final answer
   x = 42,095.91