Finding the Fourth Proportional to 8,831.58, 13,251.69 and 4,213.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,831.58 : 13,251.69 = 4,213.50 : x
2. Step 2: Convert to fraction form
   8,831.58/13,251.69 = 4,213.50/x
3. Step 3: Cross multiply
   8,831.58x = 13,251.69 × 4,213.50
4. Step 4: Simplify right side
   8,831.58x = 55,835,995.82
5. Step 5: Solve for x
   x = 55,835,995.82/8,831.58
6. Step 6: Final answer
   x = 6,322.31