Finding the Fourth Proportional to 139,453.68, 209,205.60 and 50,831.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,453.68 : 209,205.60 = 50,831.52 : x
2. Step 2: Convert to fraction form
   139,453.68/209,205.60 = 50,831.52/x
3. Step 3: Cross multiply
   139,453.68x = 209,205.60 × 50,831.52
4. Step 4: Simplify right side
   139,453.68x = 10,634,238,640.51
5. Step 5: Solve for x
   x = 10,634,238,640.51/139,453.68
6. Step 6: Final answer
   x = 76,256.42