Finding the Third Proportional to 142,838.50 and 272,717

Step by Step Solution

1. Step 1: Write the proportion equation
   142,838.50 : 272,717 = 272,717 : x
2. Step 2: Convert to fraction form
   142,838.50/272,717 = 272,717/x
3. Step 3: Cross multiply
   142,838.50x = 272,717 × 272,717
4. Step 4: Simplify right side
   142,838.50x = 74,374,562,089
5. Step 5: Solve for x
   x = 74,374,562,089/142,838.50
6. Step 6: Final answer
   x = 520,689.88