Finding the Third Proportional to 171,421.50 and 261,483

Step by Step Solution

1. Step 1: Write the proportion equation
   171,421.50 : 261,483 = 261,483 : x
2. Step 2: Convert to fraction form
   171,421.50/261,483 = 261,483/x
3. Step 3: Cross multiply
   171,421.50x = 261,483 × 261,483
4. Step 4: Simplify right side
   171,421.50x = 68,373,359,289
5. Step 5: Solve for x
   x = 68,373,359,289/171,421.50
6. Step 6: Final answer
   x = 398,861.05