Finding the Third Proportional to 5,179,156 and 7,840,664

Step by Step Solution

1. Step 1: Write the proportion equation
   5,179,156 : 7,840,664 = 7,840,664 : x
2. Step 2: Convert to fraction form
   5,179,156/7,840,664 = 7,840,664/x
3. Step 3: Cross multiply
   5,179,156x = 7,840,664 × 7,840,664
4. Step 4: Simplify right side
   5,179,156x = 61,476,011,960,896
5. Step 5: Solve for x
   x = 61,476,011,960,896/5,179,156
6. Step 6: Final answer
   x = 11,869,889.99