Finding the Fourth Proportional to 219,729.72, 303,238.62 and 139,127.88

Step by Step Solution

1. Step 1: Write the proportion equation
   219,729.72 : 303,238.62 = 139,127.88 : x
2. Step 2: Convert to fraction form
   219,729.72/303,238.62 = 139,127.88/x
3. Step 3: Cross multiply
   219,729.72x = 303,238.62 × 139,127.88
4. Step 4: Simplify right side
   219,729.72x = 42,188,946,334.73
5. Step 5: Solve for x
   x = 42,188,946,334.73/219,729.72
6. Step 6: Final answer
   x = 192,003.82