Finding the Third Proportional to 5,178,948 and 7,840,404

Step by Step Solution

1. Step 1: Write the proportion equation
   5,178,948 : 7,840,404 = 7,840,404 : x
2. Step 2: Convert to fraction form
   5,178,948/7,840,404 = 7,840,404/x
3. Step 3: Cross multiply
   5,178,948x = 7,840,404 × 7,840,404
4. Step 4: Simplify right side
   5,178,948x = 61,471,934,883,216
5. Step 5: Solve for x
   x = 61,471,934,883,216/5,178,948
6. Step 6: Final answer
   x = 11,869,579.48