Finding the Fourth Proportional to 271,941.82, 407,870.61 and 138,920.38

Step by Step Solution

1. Step 1: Write the proportion equation
   271,941.82 : 407,870.61 = 138,920.38 : x
2. Step 2: Convert to fraction form
   271,941.82/407,870.61 = 138,920.38/x
3. Step 3: Cross multiply
   271,941.82x = 407,870.61 × 138,920.38
4. Step 4: Simplify right side
   271,941.82x = 56,661,540,132.03
5. Step 5: Solve for x
   x = 56,661,540,132.03/271,941.82
6. Step 6: Final answer
   x = 208,359.05