Finding the Third Proportional to 1,987,812 and 4,290,360

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987,812 : 4,290,360 = 4,290,360 : x
2. Step 2: Convert to fraction form
   1,987,812/4,290,360 = 4,290,360/x
3. Step 3: Cross multiply
   1,987,812x = 4,290,360 × 4,290,360
4. Step 4: Simplify right side
   1,987,812x = 18,407,188,929,600
5. Step 5: Solve for x
   x = 18,407,188,929,600/1,987,812
6. Step 6: Final answer
   x = 9,260,025.06