Finding the Third Proportional to 79,321 and 172,858

Step by Step Solution

1. Step 1: Write the proportion equation
   79,321 : 172,858 = 172,858 : x
2. Step 2: Convert to fraction form
   79,321/172,858 = 172,858/x
3. Step 3: Cross multiply
   79,321x = 172,858 × 172,858
4. Step 4: Simplify right side
   79,321x = 29,879,888,164
5. Step 5: Solve for x
   x = 29,879,888,164/79,321
6. Step 6: Final answer
   x = 376,695.81