Finding the Third Proportional to 387,590 and 822,160

Step by Step Solution

1. Step 1: Write the proportion equation
   387,590 : 822,160 = 822,160 : x
2. Step 2: Convert to fraction form
   387,590/822,160 = 822,160/x
3. Step 3: Cross multiply
   387,590x = 822,160 × 822,160
4. Step 4: Simplify right side
   387,590x = 675,947,065,600
5. Step 5: Solve for x
   x = 675,947,065,600/387,590
6. Step 6: Final answer
   x = 1,743,974.47