Finding the Third Proportional to 4,209,456 and 9,258,720

Step by Step Solution

1. Step 1: Write the proportion equation
   4,209,456 : 9,258,720 = 9,258,720 : x
2. Step 2: Convert to fraction form
   4,209,456/9,258,720 = 9,258,720/x
3. Step 3: Cross multiply
   4,209,456x = 9,258,720 × 9,258,720
4. Step 4: Simplify right side
   4,209,456x = 85,723,896,038,400
5. Step 5: Solve for x
   x = 85,723,896,038,400/4,209,456
6. Step 6: Final answer
   x = 20,364,601.99