Finding the Third Proportional to 3,785,402 and 8,209,678

Step by Step Solution

1. Step 1: Write the proportion equation
   3,785,402 : 8,209,678 = 8,209,678 : x
2. Step 2: Convert to fraction form
   3,785,402/8,209,678 = 8,209,678/x
3. Step 3: Cross multiply
   3,785,402x = 8,209,678 × 8,209,678
4. Step 4: Simplify right side
   3,785,402x = 67,398,812,863,684
5. Step 5: Solve for x
   x = 67,398,812,863,684/3,785,402
6. Step 6: Final answer
   x = 17,804,928.74