Finding the Third Proportional to 5,429,924 and 7,978,673

Step by Step Solution

1. Step 1: Write the proportion equation
   5,429,924 : 7,978,673 = 7,978,673 : x
2. Step 2: Convert to fraction form
   5,429,924/7,978,673 = 7,978,673/x
3. Step 3: Cross multiply
   5,429,924x = 7,978,673 × 7,978,673
4. Step 4: Simplify right side
   5,429,924x = 63,659,222,840,929
5. Step 5: Solve for x
   x = 63,659,222,840,929/5,429,924
6. Step 6: Final answer
   x = 11,723,777.87