Finding the Third Proportional to 2,418,390 and 5,278,851

Step by Step Solution

1. Step 1: Write the proportion equation
   2,418,390 : 5,278,851 = 5,278,851 : x
2. Step 2: Convert to fraction form
   2,418,390/5,278,851 = 5,278,851/x
3. Step 3: Cross multiply
   2,418,390x = 5,278,851 × 5,278,851
4. Step 4: Simplify right side
   2,418,390x = 27,866,267,880,201
5. Step 5: Solve for x
   x = 27,866,267,880,201/2,418,390
6. Step 6: Final answer
   x = 11,522,652.62