Finding the Third Proportional to 528,940 and 805,801.50

Step by Step Solution

1. Step 1: Write the proportion equation
   528,940 : 805,801.50 = 805,801.50 : x
2. Step 2: Convert to fraction form
   528,940/805,801.50 = 805,801.50/x
3. Step 3: Cross multiply
   528,940x = 805,801.50 × 805,801.50
4. Step 4: Simplify right side
   528,940x = 649,316,057,402.25
5. Step 5: Solve for x
   x = 649,316,057,402.25/528,940
6. Step 6: Final answer
   x = 1,227,579.80