Finding the Third Proportional to 2,431,400 and 5,290,900

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431,400 : 5,290,900 = 5,290,900 : x
2. Step 2: Convert to fraction form
   2,431,400/5,290,900 = 5,290,900/x
3. Step 3: Cross multiply
   2,431,400x = 5,290,900 × 5,290,900
4. Step 4: Simplify right side
   2,431,400x = 27,993,622,810,000
5. Step 5: Solve for x
   x = 27,993,622,810,000/2,431,400
6. Step 6: Final answer
   x = 11,513,376.17