Finding the Fourth Proportional to 8,573.60, 12,831.60 and 5,981.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,573.60 : 12,831.60 = 5,981.60 : x
2. Step 2: Convert to fraction form
   8,573.60/12,831.60 = 5,981.60/x
3. Step 3: Cross multiply
   8,573.60x = 12,831.60 × 5,981.60
4. Step 4: Simplify right side
   8,573.60x = 76,753,498.56
5. Step 5: Solve for x
   x = 76,753,498.56/8,573.60
6. Step 6: Final answer
   x = 8,952.31