Finding the Third Proportional to 9,186,168 and 21,456,216

Step by Step Solution

1. Step 1: Write the proportion equation
   9,186,168 : 21,456,216 = 21,456,216 : x
2. Step 2: Convert to fraction form
   9,186,168/21,456,216 = 21,456,216/x
3. Step 3: Cross multiply
   9,186,168x = 21,456,216 × 21,456,216
4. Step 4: Simplify right side
   9,186,168x = 460,369,205,038,656
5. Step 5: Solve for x
   x = 460,369,205,038,656/9,186,168
6. Step 6: Final answer
   x = 50,115,478.51