Finding the Third Proportional to 108,128 and 172,184

Step by Step Solution

1. Step 1: Write the proportion equation
   108,128 : 172,184 = 172,184 : x
2. Step 2: Convert to fraction form
   108,128/172,184 = 172,184/x
3. Step 3: Cross multiply
   108,128x = 172,184 × 172,184
4. Step 4: Simplify right side
   108,128x = 29,647,329,856
5. Step 5: Solve for x
   x = 29,647,329,856/108,128
6. Step 6: Final answer
   x = 274,187.35