Finding the Third Proportional to 276,409 and 580,668.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,409 : 580,668.50 = 580,668.50 : x
2. Step 2: Convert to fraction form
   276,409/580,668.50 = 580,668.50/x
3. Step 3: Cross multiply
   276,409x = 580,668.50 × 580,668.50
4. Step 4: Simplify right side
   276,409x = 337,175,906,892.25
5. Step 5: Solve for x
   x = 337,175,906,892.25/276,409
6. Step 6: Final answer
   x = 1,219,844.17