Finding the Third Proportional to 387,666 and 822,298.50

Step by Step Solution

1. Step 1: Write the proportion equation
   387,666 : 822,298.50 = 822,298.50 : x
2. Step 2: Convert to fraction form
   387,666/822,298.50 = 822,298.50/x
3. Step 3: Cross multiply
   387,666x = 822,298.50 × 822,298.50
4. Step 4: Simplify right side
   387,666x = 676,174,823,102.25
5. Step 5: Solve for x
   x = 676,174,823,102.25/387,666
6. Step 6: Final answer
   x = 1,744,220.08