Finding the Fourth Proportional to 196,990.38, 271,856.86 and 120,485.48

Step by Step Solution

1. Step 1: Write the proportion equation
   196,990.38 : 271,856.86 = 120,485.48 : x
2. Step 2: Convert to fraction form
   196,990.38/271,856.86 = 120,485.48/x
3. Step 3: Cross multiply
   196,990.38x = 271,856.86 × 120,485.48
4. Step 4: Simplify right side
   196,990.38x = 32,754,802,607.89
5. Step 5: Solve for x
   x = 32,754,802,607.89/196,990.38
6. Step 6: Final answer
   x = 166,276.15