Finding the Third Proportional to 142,272 and 206,064

Step by Step Solution

1. Step 1: Write the proportion equation
   142,272 : 206,064 = 206,064 : x
2. Step 2: Convert to fraction form
   142,272/206,064 = 206,064/x
3. Step 3: Cross multiply
   142,272x = 206,064 × 206,064
4. Step 4: Simplify right side
   142,272x = 42,462,372,096
5. Step 5: Solve for x
   x = 42,462,372,096/142,272
6. Step 6: Final answer
   x = 298,459.09