Finding the Fourth Proportional to 245,796.27, 339,231.15 and 138,387.30

Step by Step Solution

1. Step 1: Write the proportion equation
   245,796.27 : 339,231.15 = 138,387.30 : x
2. Step 2: Convert to fraction form
   245,796.27/339,231.15 = 138,387.30/x
3. Step 3: Cross multiply
   245,796.27x = 339,231.15 × 138,387.30
4. Step 4: Simplify right side
   245,796.27x = 46,945,282,924.40
5. Step 5: Solve for x
   x = 46,945,282,924.40/245,796.27
6. Step 6: Final answer
   x = 190,992.66