Finding the Third Proportional to 171,421 and 261,483.50

Step by Step Solution

1. Step 1: Write the proportion equation
   171,421 : 261,483.50 = 261,483.50 : x
2. Step 2: Convert to fraction form
   171,421/261,483.50 = 261,483.50/x
3. Step 3: Cross multiply
   171,421x = 261,483.50 × 261,483.50
4. Step 4: Simplify right side
   171,421x = 68,373,620,772.25
5. Step 5: Solve for x
   x = 68,373,620,772.25/171,421
6. Step 6: Final answer
   x = 398,863.74