Finding the Third Proportional to 71,988 and 168,142

Step by Step Solution

1. Step 1: Write the proportion equation
   71,988 : 168,142 = 168,142 : x
2. Step 2: Convert to fraction form
   71,988/168,142 = 168,142/x
3. Step 3: Cross multiply
   71,988x = 168,142 × 168,142
4. Step 4: Simplify right side
   71,988x = 28,271,732,164
5. Step 5: Solve for x
   x = 28,271,732,164/71,988
6. Step 6: Final answer
   x = 392,728.40