Finding the Third Proportional to 3,521,020 and 7,420,320

Step by Step Solution

1. Step 1: Write the proportion equation
   3,521,020 : 7,420,320 = 7,420,320 : x
2. Step 2: Convert to fraction form
   3,521,020/7,420,320 = 7,420,320/x
3. Step 3: Cross multiply
   3,521,020x = 7,420,320 × 7,420,320
4. Step 4: Simplify right side
   3,521,020x = 55,061,148,902,400
5. Step 5: Solve for x
   x = 55,061,148,902,400/3,521,020
6. Step 6: Final answer
   x = 15,637,840.43