Finding the Third Proportional to 142,836 and 272,712

Step by Step Solution

1. Step 1: Write the proportion equation
   142,836 : 272,712 = 272,712 : x
2. Step 2: Convert to fraction form
   142,836/272,712 = 272,712/x
3. Step 3: Cross multiply
   142,836x = 272,712 × 272,712
4. Step 4: Simplify right side
   142,836x = 74,371,834,944
5. Step 5: Solve for x
   x = 74,371,834,944/142,836
6. Step 6: Final answer
   x = 520,679.91