Finding the Third Proportional to 528,605 and 805,299.50

Step by Step Solution

1. Step 1: Write the proportion equation
   528,605 : 805,299.50 = 805,299.50 : x
2. Step 2: Convert to fraction form
   528,605/805,299.50 = 805,299.50/x
3. Step 3: Cross multiply
   528,605x = 805,299.50 × 805,299.50
4. Step 4: Simplify right side
   528,605x = 648,507,284,700.25
5. Step 5: Solve for x
   x = 648,507,284,700.25/528,605
6. Step 6: Final answer
   x = 1,226,827.75