Finding the Third Proportional to 2,431,390 and 5,290,884

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431,390 : 5,290,884 = 5,290,884 : x
2. Step 2: Convert to fraction form
   2,431,390/5,290,884 = 5,290,884/x
3. Step 3: Cross multiply
   2,431,390x = 5,290,884 × 5,290,884
4. Step 4: Simplify right side
   2,431,390x = 27,993,453,501,456
5. Step 5: Solve for x
   x = 27,993,453,501,456/2,431,390
6. Step 6: Final answer
   x = 11,513,353.88