Finding the Third Proportional to 9,407,424 and 19,945,257

Step by Step Solution

1. Step 1: Write the proportion equation
   9,407,424 : 19,945,257 = 19,945,257 : x
2. Step 2: Convert to fraction form
   9,407,424/19,945,257 = 19,945,257/x
3. Step 3: Cross multiply
   9,407,424x = 19,945,257 × 19,945,257
4. Step 4: Simplify right side
   9,407,424x = 397,813,276,796,049
5. Step 5: Solve for x
   x = 397,813,276,796,049/9,407,424
6. Step 6: Final answer
   x = 42,287,163.50