Finding the Third Proportional to 785,604 and 1,687,470

Step by Step Solution

1. Step 1: Write the proportion equation
   785,604 : 1,687,470 = 1,687,470 : x
2. Step 2: Convert to fraction form
   785,604/1,687,470 = 1,687,470/x
3. Step 3: Cross multiply
   785,604x = 1,687,470 × 1,687,470
4. Step 4: Simplify right side
   785,604x = 2,847,555,000,900
5. Step 5: Solve for x
   x = 2,847,555,000,900/785,604
6. Step 6: Final answer
   x = 3,624,669.68