Finding the Third Proportional to 4,262,520 and 9,131,520

Step by Step Solution

1. Step 1: Write the proportion equation
   4,262,520 : 9,131,520 = 9,131,520 : x
2. Step 2: Convert to fraction form
   4,262,520/9,131,520 = 9,131,520/x
3. Step 3: Cross multiply
   4,262,520x = 9,131,520 × 9,131,520
4. Step 4: Simplify right side
   4,262,520x = 83,384,657,510,400
5. Step 5: Solve for x
   x = 83,384,657,510,400/4,262,520
6. Step 6: Final answer
   x = 19,562,291.21