Finding the Third Proportional to 21,376 and 43,808

Step by Step Solution

1. Step 1: Write the proportion equation
   21,376 : 43,808 = 43,808 : x
2. Step 2: Convert to fraction form
   21,376/43,808 = 43,808/x
3. Step 3: Cross multiply
   21,376x = 43,808 × 43,808
4. Step 4: Simplify right side
   21,376x = 1,919,140,864
5. Step 5: Solve for x
   x = 1,919,140,864/21,376
6. Step 6: Final answer
   x = 89,780.17