Finding the Third Proportional to 1,478,391 and 3,207,738

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478,391 : 3,207,738 = 3,207,738 : x
2. Step 2: Convert to fraction form
   1,478,391/3,207,738 = 3,207,738/x
3. Step 3: Cross multiply
   1,478,391x = 3,207,738 × 3,207,738
4. Step 4: Simplify right side
   1,478,391x = 10,289,583,076,644
5. Step 5: Solve for x
   x = 10,289,583,076,644/1,478,391
6. Step 6: Final answer
   x = 6,959,987.63