Finding the Third Proportional to 276,200 and 426,510.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,200 : 426,510.50 = 426,510.50 : x
2. Step 2: Convert to fraction form
   276,200/426,510.50 = 426,510.50/x
3. Step 3: Cross multiply
   276,200x = 426,510.50 × 426,510.50
4. Step 4: Simplify right side
   276,200x = 181,911,206,610.25
5. Step 5: Solve for x
   x = 181,911,206,610.25/276,200
6. Step 6: Final answer
   x = 658,621.31