Finding the Fourth Proportional to 256,520.25, 384,831.41 and 79,019.69

Step by Step Solution

1. Step 1: Write the proportion equation
   256,520.25 : 384,831.41 = 79,019.69 : x
2. Step 2: Convert to fraction form
   256,520.25/384,831.41 = 79,019.69/x
3. Step 3: Cross multiply
   256,520.25x = 384,831.41 × 79,019.69
4. Step 4: Simplify right side
   256,520.25x = 30,409,256,401.21
5. Step 5: Solve for x
   x = 30,409,256,401.21/256,520.25
6. Step 6: Final answer
   x = 118,545.25