Finding the Third Proportional to 4,188,256 and 9,118,138

Step by Step Solution

1. Step 1: Write the proportion equation
   4,188,256 : 9,118,138 = 9,118,138 : x
2. Step 2: Convert to fraction form
   4,188,256/9,118,138 = 9,118,138/x
3. Step 3: Cross multiply
   4,188,256x = 9,118,138 × 9,118,138
4. Step 4: Simplify right side
   4,188,256x = 83,140,440,587,044
5. Step 5: Solve for x
   x = 83,140,440,587,044/4,188,256
6. Step 6: Final answer
   x = 19,850,849.75