Finding the Third Proportional to 528,647.50 and 790,662.50

Step by Step Solution

1. Step 1: Write the proportion equation
   528,647.50 : 790,662.50 = 790,662.50 : x
2. Step 2: Convert to fraction form
   528,647.50/790,662.50 = 790,662.50/x
3. Step 3: Cross multiply
   528,647.50x = 790,662.50 × 790,662.50
4. Step 4: Simplify right side
   528,647.50x = 625,147,188,906.25
5. Step 5: Solve for x
   x = 625,147,188,906.25/528,647.50
6. Step 6: Final answer
   x = 1,182,540.71