Finding the Third Proportional to 299,173.50 and 654,669

Step by Step Solution

1. Step 1: Write the proportion equation
   299,173.50 : 654,669 = 654,669 : x
2. Step 2: Convert to fraction form
   299,173.50/654,669 = 654,669/x
3. Step 3: Cross multiply
   299,173.50x = 654,669 × 654,669
4. Step 4: Simplify right side
   299,173.50x = 428,591,499,561
5. Step 5: Solve for x
   x = 428,591,499,561/299,173.50
6. Step 6: Final answer
   x = 1,432,585.10