Finding the Third Proportional to 5,420,163 and 7,980,499

Step by Step Solution

1. Step 1: Write the proportion equation
   5,420,163 : 7,980,499 = 7,980,499 : x
2. Step 2: Convert to fraction form
   5,420,163/7,980,499 = 7,980,499/x
3. Step 3: Cross multiply
   5,420,163x = 7,980,499 × 7,980,499
4. Step 4: Simplify right side
   5,420,163x = 63,688,364,289,001
5. Step 5: Solve for x
   x = 63,688,364,289,001/5,420,163
6. Step 6: Final answer
   x = 11,750,267.34