Finding the Third Proportional to 142,179 and 311,142

Step by Step Solution

1. Step 1: Write the proportion equation
   142,179 : 311,142 = 311,142 : x
2. Step 2: Convert to fraction form
   142,179/311,142 = 311,142/x
3. Step 3: Cross multiply
   142,179x = 311,142 × 311,142
4. Step 4: Simplify right side
   142,179x = 96,809,344,164
5. Step 5: Solve for x
   x = 96,809,344,164/142,179
6. Step 6: Final answer
   x = 680,897.63