Finding the Third Proportional to 142,642.69 and 220,753.69

Step by Step Solution

1. Step 1: Write the proportion equation
   142,642.69 : 220,753.69 = 220,753.69 : x
2. Step 2: Convert to fraction form
   142,642.69/220,753.69 = 220,753.69/x
3. Step 3: Cross multiply
   142,642.69x = 220,753.69 × 220,753.69
4. Step 4: Simplify right side
   142,642.69x = 48,732,190,544.85
5. Step 5: Solve for x
   x = 48,732,190,544.85/142,642.69
6. Step 6: Final answer
   x = 341,638.20