Finding the Third Proportional to 9,979,784 and 21,150,158

Step by Step Solution

1. Step 1: Write the proportion equation
   9,979,784 : 21,150,158 = 21,150,158 : x
2. Step 2: Convert to fraction form
   9,979,784/21,150,158 = 21,150,158/x
3. Step 3: Cross multiply
   9,979,784x = 21,150,158 × 21,150,158
4. Step 4: Simplify right side
   9,979,784x = 447,329,183,424,964
5. Step 5: Solve for x
   x = 447,329,183,424,964/9,979,784
6. Step 6: Final answer
   x = 44,823,533.60