Finding the Third Proportional to 780,840 and 1,681,722

Step by Step Solution

1. Step 1: Write the proportion equation
   780,840 : 1,681,722 = 1,681,722 : x
2. Step 2: Convert to fraction form
   780,840/1,681,722 = 1,681,722/x
3. Step 3: Cross multiply
   780,840x = 1,681,722 × 1,681,722
4. Step 4: Simplify right side
   780,840x = 2,828,188,885,284
5. Step 5: Solve for x
   x = 2,828,188,885,284/780,840
6. Step 6: Final answer
   x = 3,621,982.59