Finding the Third Proportional to 528,849 and 805,672.50

Step by Step Solution

1. Step 1: Write the proportion equation
   528,849 : 805,672.50 = 805,672.50 : x
2. Step 2: Convert to fraction form
   528,849/805,672.50 = 805,672.50/x
3. Step 3: Cross multiply
   528,849x = 805,672.50 × 805,672.50
4. Step 4: Simplify right side
   528,849x = 649,108,177,256.25
5. Step 5: Solve for x
   x = 649,108,177,256.25/528,849
6. Step 6: Final answer
   x = 1,227,397.95