Finding the Third Proportional to 21,687.75 and 34,369.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,687.75 : 34,369.31 = 34,369.31 : x
2. Step 2: Convert to fraction form
   21,687.75/34,369.31 = 34,369.31/x
3. Step 3: Cross multiply
   21,687.75x = 34,369.31 × 34,369.31
4. Step 4: Simplify right side
   21,687.75x = 1,181,249,641.72
5. Step 5: Solve for x
   x = 1,181,249,641.72/21,687.75
6. Step 6: Final answer
   x = 54,466.21