Finding the Third Proportional to 528,986 and 804,550.50

Step by Step Solution

1. Step 1: Write the proportion equation
   528,986 : 804,550.50 = 804,550.50 : x
2. Step 2: Convert to fraction form
   528,986/804,550.50 = 804,550.50/x
3. Step 3: Cross multiply
   528,986x = 804,550.50 × 804,550.50
4. Step 4: Simplify right side
   528,986x = 647,301,507,050.25
5. Step 5: Solve for x
   x = 647,301,507,050.25/528,986
6. Step 6: Final answer
   x = 1,223,664.72