Finding the Third Proportional to 172,287 and 264,748.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,287 : 264,748.50 = 264,748.50 : x
2. Step 2: Convert to fraction form
   172,287/264,748.50 = 264,748.50/x
3. Step 3: Cross multiply
   172,287x = 264,748.50 × 264,748.50
4. Step 4: Simplify right side
   172,287x = 70,091,768,252.25
5. Step 5: Solve for x
   x = 70,091,768,252.25/172,287
6. Step 6: Final answer
   x = 406,831.44