Finding the Third Proportional to 8,443,278 and 19,911,663

Step by Step Solution

1. Step 1: Write the proportion equation
   8,443,278 : 19,911,663 = 19,911,663 : x
2. Step 2: Convert to fraction form
   8,443,278/19,911,663 = 19,911,663/x
3. Step 3: Cross multiply
   8,443,278x = 19,911,663 × 19,911,663
4. Step 4: Simplify right side
   8,443,278x = 396,474,323,425,569
5. Step 5: Solve for x
   x = 396,474,323,425,569/8,443,278
6. Step 6: Final answer
   x = 46,957,393.02