Finding the Third Proportional to 620,920 and 1,358,072

Step by Step Solution

1. Step 1: Write the proportion equation
   620,920 : 1,358,072 = 1,358,072 : x
2. Step 2: Convert to fraction form
   620,920/1,358,072 = 1,358,072/x
3. Step 3: Cross multiply
   620,920x = 1,358,072 × 1,358,072
4. Step 4: Simplify right side
   620,920x = 1,844,359,557,184
5. Step 5: Solve for x
   x = 1,844,359,557,184/620,920
6. Step 6: Final answer
   x = 2,970,365.84