Finding the Fourth Proportional to 8,011.76, 11,993.98 and 5,917.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,011.76 : 11,993.98 = 5,917.86 : x
2. Step 2: Convert to fraction form
   8,011.76/11,993.98 = 5,917.86/x
3. Step 3: Cross multiply
   8,011.76x = 11,993.98 × 5,917.86
4. Step 4: Simplify right side
   8,011.76x = 70,978,664.89
5. Step 5: Solve for x
   x = 70,978,664.89/8,011.76
6. Step 6: Final answer
   x = 8,859.31