Finding the Third Proportional to 721,020 and 1,669,116

Step by Step Solution

1. Step 1: Write the proportion equation
   721,020 : 1,669,116 = 1,669,116 : x
2. Step 2: Convert to fraction form
   721,020/1,669,116 = 1,669,116/x
3. Step 3: Cross multiply
   721,020x = 1,669,116 × 1,669,116
4. Step 4: Simplify right side
   721,020x = 2,785,948,221,456
5. Step 5: Solve for x
   x = 2,785,948,221,456/721,020
6. Step 6: Final answer
   x = 3,863,898.67