Finding the Fourth Proportional to 8,079.86, 11,148.27 and 5,385.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,079.86 : 11,148.27 = 5,385.75 : x
2. Step 2: Convert to fraction form
   8,079.86/11,148.27 = 5,385.75/x
3. Step 3: Cross multiply
   8,079.86x = 11,148.27 × 5,385.75
4. Step 4: Simplify right side
   8,079.86x = 60,041,795.15
5. Step 5: Solve for x
   x = 60,041,795.15/8,079.86
6. Step 6: Final answer
   x = 7,431.04