Finding the Third Proportional to 142,632 and 220,860

Step by Step Solution

1. Step 1: Write the proportion equation
   142,632 : 220,860 = 220,860 : x
2. Step 2: Convert to fraction form
   142,632/220,860 = 220,860/x
3. Step 3: Cross multiply
   142,632x = 220,860 × 220,860
4. Step 4: Simplify right side
   142,632x = 48,779,139,600
5. Step 5: Solve for x
   x = 48,779,139,600/142,632
6. Step 6: Final answer
   x = 341,992.96