Finding the Third Proportional to 4,988,738 and 7,775,139

Step by Step Solution

1. Step 1: Write the proportion equation
   4,988,738 : 7,775,139 = 7,775,139 : x
2. Step 2: Convert to fraction form
   4,988,738/7,775,139 = 7,775,139/x
3. Step 3: Cross multiply
   4,988,738x = 7,775,139 × 7,775,139
4. Step 4: Simplify right side
   4,988,738x = 60,452,786,469,321
5. Step 5: Solve for x
   x = 60,452,786,469,321/4,988,738
6. Step 6: Final answer
   x = 12,117,851.54