Finding the Third Proportional to 5,178,826 and 7,840,205

Step by Step Solution

1. Step 1: Write the proportion equation
   5,178,826 : 7,840,205 = 7,840,205 : x
2. Step 2: Convert to fraction form
   5,178,826/7,840,205 = 7,840,205/x
3. Step 3: Cross multiply
   5,178,826x = 7,840,205 × 7,840,205
4. Step 4: Simplify right side
   5,178,826x = 61,468,814,442,025
5. Step 5: Solve for x
   x = 61,468,814,442,025/5,178,826
6. Step 6: Final answer
   x = 11,869,256.55