Finding the Third Proportional to 12,984,790 and 20,185,976

Step by Step Solution

1. Step 1: Write the proportion equation
   12,984,790 : 20,185,976 = 20,185,976 : x
2. Step 2: Convert to fraction form
   12,984,790/20,185,976 = 20,185,976/x
3. Step 3: Cross multiply
   12,984,790x = 20,185,976 × 20,185,976
4. Step 4: Simplify right side
   12,984,790x = 407,473,627,072,576
5. Step 5: Solve for x
   x = 407,473,627,072,576/12,984,790
6. Step 6: Final answer
   x = 31,380,840.74