Finding the Third Proportional to 9,407,454 and 19,945,318

Step by Step Solution

1. Step 1: Write the proportion equation
   9,407,454 : 19,945,318 = 19,945,318 : x
2. Step 2: Convert to fraction form
   9,407,454/19,945,318 = 19,945,318/x
3. Step 3: Cross multiply
   9,407,454x = 19,945,318 × 19,945,318
4. Step 4: Simplify right side
   9,407,454x = 397,815,710,121,124
5. Step 5: Solve for x
   x = 397,815,710,121,124/9,407,454
6. Step 6: Final answer
   x = 42,287,287.31