Finding the Fourth Proportional to 245,796.78, 339,205.83 and 138,370.58

Step by Step Solution

1. Step 1: Write the proportion equation
   245,796.78 : 339,205.83 = 138,370.58 : x
2. Step 2: Convert to fraction form
   245,796.78/339,205.83 = 138,370.58/x
3. Step 3: Cross multiply
   245,796.78x = 339,205.83 × 138,370.58
4. Step 4: Simplify right side
   245,796.78x = 46,936,108,284.50
5. Step 5: Solve for x
   x = 46,936,108,284.50/245,796.78
6. Step 6: Final answer
   x = 190,954.94