Finding the Third Proportional to 21,693.38 and 43,990.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,693.38 : 43,990.31 = 43,990.31 : x
2. Step 2: Convert to fraction form
   21,693.38/43,990.31 = 43,990.31/x
3. Step 3: Cross multiply
   21,693.38x = 43,990.31 × 43,990.31
4. Step 4: Simplify right side
   21,693.38x = 1,935,147,593.85
5. Step 5: Solve for x
   x = 1,935,147,593.85/21,693.38
6. Step 6: Final answer
   x = 89,204.54