Finding the Fourth Proportional to 8,078.86, 11,146.89 and 5,384.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,078.86 : 11,146.89 = 5,384.75 : x
2. Step 2: Convert to fraction form
   8,078.86/11,146.89 = 5,384.75/x
3. Step 3: Cross multiply
   8,078.86x = 11,146.89 × 5,384.75
4. Step 4: Simplify right side
   8,078.86x = 60,023,215.93
5. Step 5: Solve for x
   x = 60,023,215.93/8,078.86
6. Step 6: Final answer
   x = 7,429.66