Finding the Third Proportional to 142,635 and 220,864.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,635 : 220,864.50 = 220,864.50 : x
2. Step 2: Convert to fraction form
   142,635/220,864.50 = 220,864.50/x
3. Step 3: Cross multiply
   142,635x = 220,864.50 × 220,864.50
4. Step 4: Simplify right side
   142,635x = 48,781,127,360.25
5. Step 5: Solve for x
   x = 48,781,127,360.25/142,635
6. Step 6: Final answer
   x = 341,999.70