Finding the Fourth Proportional to 245,806.72, 339,219.83 and 138,380.82

Step by Step Solution

1. Step 1: Write the proportion equation
   245,806.72 : 339,219.83 = 138,380.82 : x
2. Step 2: Convert to fraction form
   245,806.72/339,219.83 = 138,380.82/x
3. Step 3: Cross multiply
   245,806.72x = 339,219.83 × 138,380.82
4. Step 4: Simplify right side
   245,806.72x = 46,941,517,309.54
5. Step 5: Solve for x
   x = 46,941,517,309.54/245,806.72
6. Step 6: Final answer
   x = 190,969.22