Finding the Third Proportional to 129,931.50 and 279,951

Step by Step Solution

1. Step 1: Write the proportion equation
   129,931.50 : 279,951 = 279,951 : x
2. Step 2: Convert to fraction form
   129,931.50/279,951 = 279,951/x
3. Step 3: Cross multiply
   129,931.50x = 279,951 × 279,951
4. Step 4: Simplify right side
   129,931.50x = 78,372,562,401
5. Step 5: Solve for x
   x = 78,372,562,401/129,931.50
6. Step 6: Final answer
   x = 603,183.70