Finding the Third Proportional to 5,086,656 and 7,129,440

Step by Step Solution

1. Step 1: Write the proportion equation
   5,086,656 : 7,129,440 = 7,129,440 : x
2. Step 2: Convert to fraction form
   5,086,656/7,129,440 = 7,129,440/x
3. Step 3: Cross multiply
   5,086,656x = 7,129,440 × 7,129,440
4. Step 4: Simplify right side
   5,086,656x = 50,828,914,713,600
5. Step 5: Solve for x
   x = 50,828,914,713,600/5,086,656
6. Step 6: Final answer
   x = 9,992,599.21