Finding the Third Proportional to 4,207,855 and 9,203,028

Step by Step Solution

1. Step 1: Write the proportion equation
   4,207,855 : 9,203,028 = 9,203,028 : x
2. Step 2: Convert to fraction form
   4,207,855/9,203,028 = 9,203,028/x
3. Step 3: Cross multiply
   4,207,855x = 9,203,028 × 9,203,028
4. Step 4: Simplify right side
   4,207,855x = 84,695,724,368,784
5. Step 5: Solve for x
   x = 84,695,724,368,784/4,207,855
6. Step 6: Final answer
   x = 20,128,004.50