Finding the Third Proportional to 2,431,430 and 5,290,990

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431,430 : 5,290,990 = 5,290,990 : x
2. Step 2: Convert to fraction form
   2,431,430/5,290,990 = 5,290,990/x
3. Step 3: Cross multiply
   2,431,430x = 5,290,990 × 5,290,990
4. Step 4: Simplify right side
   2,431,430x = 27,994,575,180,100
5. Step 5: Solve for x
   x = 27,994,575,180,100/2,431,430
6. Step 6: Final answer
   x = 11,513,625.80