Finding the Third Proportional to 4,183,136 and 8,868,560

Step by Step Solution

1. Step 1: Write the proportion equation
   4,183,136 : 8,868,560 = 8,868,560 : x
2. Step 2: Convert to fraction form
   4,183,136/8,868,560 = 8,868,560/x
3. Step 3: Cross multiply
   4,183,136x = 8,868,560 × 8,868,560
4. Step 4: Simplify right side
   4,183,136x = 78,651,356,473,600
5. Step 5: Solve for x
   x = 78,651,356,473,600/4,183,136
6. Step 6: Final answer
   x = 18,802,007.98