Finding the Third Proportional to 21,429 and 43,902

Step by Step Solution

1. Step 1: Write the proportion equation
   21,429 : 43,902 = 43,902 : x
2. Step 2: Convert to fraction form
   21,429/43,902 = 43,902/x
3. Step 3: Cross multiply
   21,429x = 43,902 × 43,902
4. Step 4: Simplify right side
   21,429x = 1,927,385,604
5. Step 5: Solve for x
   x = 1,927,385,604/21,429
6. Step 6: Final answer
   x = 89,942.86