Finding the Fourth Proportional to 20,831.94, 31,251.56 and 13,443.52

Step by Step Solution

1. Step 1: Write the proportion equation
   20,831.94 : 31,251.56 = 13,443.52 : x
2. Step 2: Convert to fraction form
   20,831.94/31,251.56 = 13,443.52/x
3. Step 3: Cross multiply
   20,831.94x = 31,251.56 × 13,443.52
4. Step 4: Simplify right side
   20,831.94x = 420,130,971.89
5. Step 5: Solve for x
   x = 420,130,971.89/20,831.94
6. Step 6: Final answer
   x = 20,167.64