Finding the Third Proportional to 3,499,398 and 7,278,000

Step by Step Solution

1. Step 1: Write the proportion equation
   3,499,398 : 7,278,000 = 7,278,000 : x
2. Step 2: Convert to fraction form
   3,499,398/7,278,000 = 7,278,000/x
3. Step 3: Cross multiply
   3,499,398x = 7,278,000 × 7,278,000
4. Step 4: Simplify right side
   3,499,398x = 52,969,284,000,000
5. Step 5: Solve for x
   x = 52,969,284,000,000/3,499,398
6. Step 6: Final answer
   x = 15,136,684.65