Finding the Third Proportional to 3,934,278 and 5,315,166

Step by Step Solution

1. Step 1: Write the proportion equation
   3,934,278 : 5,315,166 = 5,315,166 : x
2. Step 2: Convert to fraction form
   3,934,278/5,315,166 = 5,315,166/x
3. Step 3: Cross multiply
   3,934,278x = 5,315,166 × 5,315,166
4. Step 4: Simplify right side
   3,934,278x = 28,250,989,607,556
5. Step 5: Solve for x
   x = 28,250,989,607,556/3,934,278
6. Step 6: Final answer
   x = 7,180,730.39