Finding the Third Proportional to 276,196.50 and 426,505.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,196.50 : 426,505.50 = 426,505.50 : x
2. Step 2: Convert to fraction form
   276,196.50/426,505.50 = 426,505.50/x
3. Step 3: Cross multiply
   276,196.50x = 426,505.50 × 426,505.50
4. Step 4: Simplify right side
   276,196.50x = 181,906,941,530.25
5. Step 5: Solve for x
   x = 181,906,941,530.25/276,196.50
6. Step 6: Final answer
   x = 658,614.22