Finding the Fourth Proportional to 80,831.34, 111,544.36 and 45,019.42

Step by Step Solution

1. Step 1: Write the proportion equation
   80,831.34 : 111,544.36 = 45,019.42 : x
2. Step 2: Convert to fraction form
   80,831.34/111,544.36 = 45,019.42/x
3. Step 3: Cross multiply
   80,831.34x = 111,544.36 × 45,019.42
4. Step 4: Simplify right side
   80,831.34x = 5,021,662,000.06
5. Step 5: Solve for x
   x = 5,021,662,000.06/80,831.34
6. Step 6: Final answer
   x = 62,125.19