Finding the Fourth Proportional to 8,109.86, 11,191.61 and 4,525.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,109.86 : 11,191.61 = 4,525.09 : x
2. Step 2: Convert to fraction form
   8,109.86/11,191.61 = 4,525.09/x
3. Step 3: Cross multiply
   8,109.86x = 11,191.61 × 4,525.09
4. Step 4: Simplify right side
   8,109.86x = 50,643,025.83
5. Step 5: Solve for x
   x = 50,643,025.83/8,109.86
6. Step 6: Final answer
   x = 6,244.63