Finding the Third Proportional to 142,500 and 220,639.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,500 : 220,639.50 = 220,639.50 : x
2. Step 2: Convert to fraction form
   142,500/220,639.50 = 220,639.50/x
3. Step 3: Cross multiply
   142,500x = 220,639.50 × 220,639.50
4. Step 4: Simplify right side
   142,500x = 48,681,788,960.25
5. Step 5: Solve for x
   x = 48,681,788,960.25/142,500
6. Step 6: Final answer
   x = 341,626.59