Finding the Third Proportional to 276,408 and 580,666.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,408 : 580,666.50 = 580,666.50 : x
2. Step 2: Convert to fraction form
   276,408/580,666.50 = 580,666.50/x
3. Step 3: Cross multiply
   276,408x = 580,666.50 × 580,666.50
4. Step 4: Simplify right side
   276,408x = 337,173,584,222.25
5. Step 5: Solve for x
   x = 337,173,584,222.25/276,408
6. Step 6: Final answer
   x = 1,219,840.18