Finding the Third Proportional to 53,949.38 and 81,673.31

Step by Step Solution

1. Step 1: Write the proportion equation
   53,949.38 : 81,673.31 = 81,673.31 : x
2. Step 2: Convert to fraction form
   53,949.38/81,673.31 = 81,673.31/x
3. Step 3: Cross multiply
   53,949.38x = 81,673.31 × 81,673.31
4. Step 4: Simplify right side
   53,949.38x = 6,670,529,974.72
5. Step 5: Solve for x
   x = 6,670,529,974.72/53,949.38
6. Step 6: Final answer
   x = 123,644.25