Finding the Third Proportional to 3,508,978 and 5,289,387

Step by Step Solution

1. Step 1: Write the proportion equation
   3,508,978 : 5,289,387 = 5,289,387 : x
2. Step 2: Convert to fraction form
   3,508,978/5,289,387 = 5,289,387/x
3. Step 3: Cross multiply
   3,508,978x = 5,289,387 × 5,289,387
4. Step 4: Simplify right side
   3,508,978x = 27,977,614,835,769
5. Step 5: Solve for x
   x = 27,977,614,835,769/3,508,978
6. Step 6: Final answer
   x = 7,973,151.96