Finding the Third Proportional to 777,816 and 1,688,418

Step by Step Solution

1. Step 1: Write the proportion equation
   777,816 : 1,688,418 = 1,688,418 : x
2. Step 2: Convert to fraction form
   777,816/1,688,418 = 1,688,418/x
3. Step 3: Cross multiply
   777,816x = 1,688,418 × 1,688,418
4. Step 4: Simplify right side
   777,816x = 2,850,755,342,724
5. Step 5: Solve for x
   x = 2,850,755,342,724/777,816
6. Step 6: Final answer
   x = 3,665,076.76