Finding the Third Proportional to 1,578,360 and 3,422,310

Step by Step Solution

1. Step 1: Write the proportion equation
   1,578,360 : 3,422,310 = 3,422,310 : x
2. Step 2: Convert to fraction form
   1,578,360/3,422,310 = 3,422,310/x
3. Step 3: Cross multiply
   1,578,360x = 3,422,310 × 3,422,310
4. Step 4: Simplify right side
   1,578,360x = 11,712,205,736,100
5. Step 5: Solve for x
   x = 11,712,205,736,100/1,578,360
6. Step 6: Final answer
   x = 7,420,490.72