Finding the Third Proportional to 4,221,028 and 8,591,106

Step by Step Solution

1. Step 1: Write the proportion equation
   4,221,028 : 8,591,106 = 8,591,106 : x
2. Step 2: Convert to fraction form
   4,221,028/8,591,106 = 8,591,106/x
3. Step 3: Cross multiply
   4,221,028x = 8,591,106 × 8,591,106
4. Step 4: Simplify right side
   4,221,028x = 73,807,102,303,236
5. Step 5: Solve for x
   x = 73,807,102,303,236/4,221,028
6. Step 6: Final answer
   x = 17,485,575.15