Finding the Third Proportional to 172,188 and 271,488

Step by Step Solution

1. Step 1: Write the proportion equation
   172,188 : 271,488 = 271,488 : x
2. Step 2: Convert to fraction form
   172,188/271,488 = 271,488/x
3. Step 3: Cross multiply
   172,188x = 271,488 × 271,488
4. Step 4: Simplify right side
   172,188x = 73,705,734,144
5. Step 5: Solve for x
   x = 73,705,734,144/172,188
6. Step 6: Final answer
   x = 428,053.84