Finding the Third Proportional to 21,451.50 and 42,822

Step by Step Solution

1. Step 1: Write the proportion equation
   21,451.50 : 42,822 = 42,822 : x
2. Step 2: Convert to fraction form
   21,451.50/42,822 = 42,822/x
3. Step 3: Cross multiply
   21,451.50x = 42,822 × 42,822
4. Step 4: Simplify right side
   21,451.50x = 1,833,723,684
5. Step 5: Solve for x
   x = 1,833,723,684/21,451.50
6. Step 6: Final answer
   x = 85,482.31