Finding the Fourth Proportional to 339,578.42, 508,667.71 and 198,910.58

Step by Step Solution

1. Step 1: Write the proportion equation
   339,578.42 : 508,667.71 = 198,910.58 : x
2. Step 2: Convert to fraction form
   339,578.42/508,667.71 = 198,910.58/x
3. Step 3: Cross multiply
   339,578.42x = 508,667.71 × 198,910.58
4. Step 4: Simplify right side
   339,578.42x = 101,179,389,223.37
5. Step 5: Solve for x
   x = 101,179,389,223.37/339,578.42
6. Step 6: Final answer
   x = 297,955.89