Finding the Third Proportional to 310,878 and 822,777.75

Step by Step Solution

1. Step 1: Write the proportion equation
   310,878 : 822,777.75 = 822,777.75 : x
2. Step 2: Convert to fraction form
   310,878/822,777.75 = 822,777.75/x
3. Step 3: Cross multiply
   310,878x = 822,777.75 × 822,777.75
4. Step 4: Simplify right side
   310,878x = 676,963,225,895.06
5. Step 5: Solve for x
   x = 676,963,225,895.06/310,878
6. Step 6: Final answer
   x = 2,177,584.86