Finding the Third Proportional to 528,631 and 851,176.50

Step by Step Solution

1. Step 1: Write the proportion equation
   528,631 : 851,176.50 = 851,176.50 : x
2. Step 2: Convert to fraction form
   528,631/851,176.50 = 851,176.50/x
3. Step 3: Cross multiply
   528,631x = 851,176.50 × 851,176.50
4. Step 4: Simplify right side
   528,631x = 724,501,434,152.25
5. Step 5: Solve for x
   x = 724,501,434,152.25/528,631
6. Step 6: Final answer
   x = 1,370,523.93