Finding the Third Proportional to 3,086.86 and 4,910.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,086.86 : 4,910.78 = 4,910.78 : x
2. Step 2: Convert to fraction form
   3,086.86/4,910.78 = 4,910.78/x
3. Step 3: Cross multiply
   3,086.86x = 4,910.78 × 4,910.78
4. Step 4: Simplify right side
   3,086.86x = 24,115,791.67
5. Step 5: Solve for x
   x = 24,115,791.67/3,086.86
6. Step 6: Final answer
   x = 7,812.40