Finding the Fourth Proportional to 245,814.27, 339,223.33 and 138,418.91

Step by Step Solution

1. Step 1: Write the proportion equation
   245,814.27 : 339,223.33 = 138,418.91 : x
2. Step 2: Convert to fraction form
   245,814.27/339,223.33 = 138,418.91/x
3. Step 3: Cross multiply
   245,814.27x = 339,223.33 × 138,418.91
4. Step 4: Simplify right side
   245,814.27x = 46,954,921,196.96
5. Step 5: Solve for x
   x = 46,954,921,196.96/245,814.27
6. Step 6: Final answer
   x = 191,017.88