Finding the Third Proportional to 139,755.38 and 217,936.83

Step by Step Solution

1. Step 1: Write the proportion equation
   139,755.38 : 217,936.83 = 217,936.83 : x
2. Step 2: Convert to fraction form
   139,755.38/217,936.83 = 217,936.83/x
3. Step 3: Cross multiply
   139,755.38x = 217,936.83 × 217,936.83
4. Step 4: Simplify right side
   139,755.38x = 47,496,461,053.19
5. Step 5: Solve for x
   x = 47,496,461,053.19/139,755.38
6. Step 6: Final answer
   x = 339,854.27