Finding the Third Proportional to 142,860 and 272,760

Step by Step Solution

1. Step 1: Write the proportion equation
   142,860 : 272,760 = 272,760 : x
2. Step 2: Convert to fraction form
   142,860/272,760 = 272,760/x
3. Step 3: Cross multiply
   142,860x = 272,760 × 272,760
4. Step 4: Simplify right side
   142,860x = 74,398,017,600
5. Step 5: Solve for x
   x = 74,398,017,600/142,860
6. Step 6: Final answer
   x = 520,775.71