Finding the Third Proportional to 4,518,643 and 9,933,981

Step by Step Solution

1. Step 1: Write the proportion equation
   4,518,643 : 9,933,981 = 9,933,981 : x
2. Step 2: Convert to fraction form
   4,518,643/9,933,981 = 9,933,981/x
3. Step 3: Cross multiply
   4,518,643x = 9,933,981 × 9,933,981
4. Step 4: Simplify right side
   4,518,643x = 98,683,978,508,361
5. Step 5: Solve for x
   x = 98,683,978,508,361/4,518,643
6. Step 6: Final answer
   x = 21,839,295.23