Finding the Third Proportional to 79,242 and 172,700

Step by Step Solution

1. Step 1: Write the proportion equation
   79,242 : 172,700 = 172,700 : x
2. Step 2: Convert to fraction form
   79,242/172,700 = 172,700/x
3. Step 3: Cross multiply
   79,242x = 172,700 × 172,700
4. Step 4: Simplify right side
   79,242x = 29,825,290,000
5. Step 5: Solve for x
   x = 29,825,290,000/79,242
6. Step 6: Final answer
   x = 376,382.35