Finding the Third Proportional to 817,970 and 1,676,640

Step by Step Solution

1. Step 1: Write the proportion equation
   817,970 : 1,676,640 = 1,676,640 : x
2. Step 2: Convert to fraction form
   817,970/1,676,640 = 1,676,640/x
3. Step 3: Cross multiply
   817,970x = 1,676,640 × 1,676,640
4. Step 4: Simplify right side
   817,970x = 2,811,121,689,600
5. Step 5: Solve for x
   x = 2,811,121,689,600/817,970
6. Step 6: Final answer
   x = 3,436,705.12