Finding the Fourth Proportional to 11,221.42, 16,831.52 and 3,429.64

Step by Step Solution

1. Step 1: Write the proportion equation
   11,221.42 : 16,831.52 = 3,429.64 : x
2. Step 2: Convert to fraction form
   11,221.42/16,831.52 = 3,429.64/x
3. Step 3: Cross multiply
   11,221.42x = 16,831.52 × 3,429.64
4. Step 4: Simplify right side
   11,221.42x = 57,726,054.25
5. Step 5: Solve for x
   x = 57,726,054.25/11,221.42
6. Step 6: Final answer
   x = 5,144.27