Finding the Third Proportional to 276,411 and 580,672.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,411 : 580,672.50 = 580,672.50 : x
2. Step 2: Convert to fraction form
   276,411/580,672.50 = 580,672.50/x
3. Step 3: Cross multiply
   276,411x = 580,672.50 × 580,672.50
4. Step 4: Simplify right side
   276,411x = 337,180,552,256.25
5. Step 5: Solve for x
   x = 337,180,552,256.25/276,411
6. Step 6: Final answer
   x = 1,219,852.15