Finding the Fourth Proportional to 8,081.57, 12,106.56 and 5,299.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,081.57 : 12,106.56 = 5,299.75 : x
2. Step 2: Convert to fraction form
   8,081.57/12,106.56 = 5,299.75/x
3. Step 3: Cross multiply
   8,081.57x = 12,106.56 × 5,299.75
4. Step 4: Simplify right side
   8,081.57x = 64,161,810.42
5. Step 5: Solve for x
   x = 64,161,810.42/8,081.57
6. Step 6: Final answer
   x = 7,939.27