Finding the Third Proportional to 397,185 and 851,227.50

Step by Step Solution

1. Step 1: Write the proportion equation
   397,185 : 851,227.50 = 851,227.50 : x
2. Step 2: Convert to fraction form
   397,185/851,227.50 = 851,227.50/x
3. Step 3: Cross multiply
   397,185x = 851,227.50 × 851,227.50
4. Step 4: Simplify right side
   397,185x = 724,588,256,756.25
5. Step 5: Solve for x
   x = 724,588,256,756.25/397,185
6. Step 6: Final answer
   x = 1,824,309.22