Finding the Third Proportional to 276,396 and 580,655.25

Step by Step Solution

1. Step 1: Write the proportion equation
   276,396 : 580,655.25 = 580,655.25 : x
2. Step 2: Convert to fraction form
   276,396/580,655.25 = 580,655.25/x
3. Step 3: Cross multiply
   276,396x = 580,655.25 × 580,655.25
4. Step 4: Simplify right side
   276,396x = 337,160,519,352.56
5. Step 5: Solve for x
   x = 337,160,519,352.56/276,396
6. Step 6: Final answer
   x = 1,219,845.87