Finding the Third Proportional to 644,016 and 1,415,520

Step by Step Solution

1. Step 1: Write the proportion equation
   644,016 : 1,415,520 = 1,415,520 : x
2. Step 2: Convert to fraction form
   644,016/1,415,520 = 1,415,520/x
3. Step 3: Cross multiply
   644,016x = 1,415,520 × 1,415,520
4. Step 4: Simplify right side
   644,016x = 2,003,696,870,400
5. Step 5: Solve for x
   x = 2,003,696,870,400/644,016
6. Step 6: Final answer
   x = 3,111,253.25