Finding the Third Proportional to 9,407,445 and 19,945,299

Step by Step Solution

1. Step 1: Write the proportion equation
   9,407,445 : 19,945,299 = 19,945,299 : x
2. Step 2: Convert to fraction form
   9,407,445/19,945,299 = 19,945,299/x
3. Step 3: Cross multiply
   9,407,445x = 19,945,299 × 19,945,299
4. Step 4: Simplify right side
   9,407,445x = 397,814,952,199,401
5. Step 5: Solve for x
   x = 397,814,952,199,401/9,407,445
6. Step 6: Final answer
   x = 42,287,247.20