Finding the Third Proportional to 67,589.50 and 139,463

Step by Step Solution

1. Step 1: Write the proportion equation
   67,589.50 : 139,463 = 139,463 : x
2. Step 2: Convert to fraction form
   67,589.50/139,463 = 139,463/x
3. Step 3: Cross multiply
   67,589.50x = 139,463 × 139,463
4. Step 4: Simplify right side
   67,589.50x = 19,449,928,369
5. Step 5: Solve for x
   x = 19,449,928,369/67,589.50
6. Step 6: Final answer
   x = 287,765.53