Finding the Third Proportional to 5,121,198 and 7,929,126

Step by Step Solution

1. Step 1: Write the proportion equation
   5,121,198 : 7,929,126 = 7,929,126 : x
2. Step 2: Convert to fraction form
   5,121,198/7,929,126 = 7,929,126/x
3. Step 3: Cross multiply
   5,121,198x = 7,929,126 × 7,929,126
4. Step 4: Simplify right side
   5,121,198x = 62,871,039,123,876
5. Step 5: Solve for x
   x = 62,871,039,123,876/5,121,198
6. Step 6: Final answer
   x = 12,276,627.29