Finding the Third Proportional to 142,830 and 272,700

Step by Step Solution

1. Step 1: Write the proportion equation
   142,830 : 272,700 = 272,700 : x
2. Step 2: Convert to fraction form
   142,830/272,700 = 272,700/x
3. Step 3: Cross multiply
   142,830x = 272,700 × 272,700
4. Step 4: Simplify right side
   142,830x = 74,365,290,000
5. Step 5: Solve for x
   x = 74,365,290,000/142,830
6. Step 6: Final answer
   x = 520,655.95