Finding the Third Proportional to 276,861 and 395,911.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,861 : 395,911.50 = 395,911.50 : x
2. Step 2: Convert to fraction form
   276,861/395,911.50 = 395,911.50/x
3. Step 3: Cross multiply
   276,861x = 395,911.50 × 395,911.50
4. Step 4: Simplify right side
   276,861x = 156,745,915,832.25
5. Step 5: Solve for x
   x = 156,745,915,832.25/276,861
6. Step 6: Final answer
   x = 566,153.83