Finding the Third Proportional to 620,828 and 1,355,380

Step by Step Solution

1. Step 1: Write the proportion equation
   620,828 : 1,355,380 = 1,355,380 : x
2. Step 2: Convert to fraction form
   620,828/1,355,380 = 1,355,380/x
3. Step 3: Cross multiply
   620,828x = 1,355,380 × 1,355,380
4. Step 4: Simplify right side
   620,828x = 1,837,054,944,400
5. Step 5: Solve for x
   x = 1,837,054,944,400/620,828
6. Step 6: Final answer
   x = 2,959,040.10