Finding the Third Proportional to 67,059.75 and 139,626.75

Step by Step Solution

1. Step 1: Write the proportion equation
   67,059.75 : 139,626.75 = 139,626.75 : x
2. Step 2: Convert to fraction form
   67,059.75/139,626.75 = 139,626.75/x
3. Step 3: Cross multiply
   67,059.75x = 139,626.75 × 139,626.75
4. Step 4: Simplify right side
   67,059.75x = 19,495,629,315.56
5. Step 5: Solve for x
   x = 19,495,629,315.56/67,059.75
6. Step 6: Final answer
   x = 290,720.28