Finding the Third Proportional to 3,870,456 and 5,413,478

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870,456 : 5,413,478 = 5,413,478 : x
2. Step 2: Convert to fraction form
   3,870,456/5,413,478 = 5,413,478/x
3. Step 3: Cross multiply
   3,870,456x = 5,413,478 × 5,413,478
4. Step 4: Simplify right side
   3,870,456x = 29,305,744,056,484
5. Step 5: Solve for x
   x = 29,305,744,056,484/3,870,456
6. Step 6: Final answer
   x = 7,571,651.52