Finding the Third Proportional to 67,013.50 and 139,538

Step by Step Solution

1. Step 1: Write the proportion equation
   67,013.50 : 139,538 = 139,538 : x
2. Step 2: Convert to fraction form
   67,013.50/139,538 = 139,538/x
3. Step 3: Cross multiply
   67,013.50x = 139,538 × 139,538
4. Step 4: Simplify right side
   67,013.50x = 19,470,853,444
5. Step 5: Solve for x
   x = 19,470,853,444/67,013.50
6. Step 6: Final answer
   x = 290,551.21