Finding the Third Proportional to 4,255,788 and 9,456,216

Step by Step Solution

1. Step 1: Write the proportion equation
   4,255,788 : 9,456,216 = 9,456,216 : x
2. Step 2: Convert to fraction form
   4,255,788/9,456,216 = 9,456,216/x
3. Step 3: Cross multiply
   4,255,788x = 9,456,216 × 9,456,216
4. Step 4: Simplify right side
   4,255,788x = 89,420,021,038,656
5. Step 5: Solve for x
   x = 89,420,021,038,656/4,255,788
6. Step 6: Final answer
   x = 21,011,389.91