Finding the Fourth Proportional to 45,421.05, 68,131.83 and 13,831.41

Step by Step Solution

1. Step 1: Write the proportion equation
   45,421.05 : 68,131.83 = 13,831.41 : x
2. Step 2: Convert to fraction form
   45,421.05/68,131.83 = 13,831.41/x
3. Step 3: Cross multiply
   45,421.05x = 68,131.83 × 13,831.41
4. Step 4: Simplify right side
   45,421.05x = 942,359,274.78
5. Step 5: Solve for x
   x = 942,359,274.78/45,421.05
6. Step 6: Final answer
   x = 20,747.19