Finding the Third Proportional to 12,861,774 and 19,906,209

Step by Step Solution

1. Step 1: Write the proportion equation
   12,861,774 : 19,906,209 = 19,906,209 : x
2. Step 2: Convert to fraction form
   12,861,774/19,906,209 = 19,906,209/x
3. Step 3: Cross multiply
   12,861,774x = 19,906,209 × 19,906,209
4. Step 4: Simplify right side
   12,861,774x = 396,257,156,751,681
5. Step 5: Solve for x
   x = 396,257,156,751,681/12,861,774
6. Step 6: Final answer
   x = 30,808,903.71