Finding the Fourth Proportional to 339,841.16, 509,728.76 and 103,185.89

Step by Step Solution

1. Step 1: Write the proportion equation
   339,841.16 : 509,728.76 = 103,185.89 : x
2. Step 2: Convert to fraction form
   339,841.16/509,728.76 = 103,185.89/x
3. Step 3: Cross multiply
   339,841.16x = 509,728.76 × 103,185.89
4. Step 4: Simplify right side
   339,841.16x = 52,596,815,243.27
5. Step 5: Solve for x
   x = 52,596,815,243.27/339,841.16
6. Step 6: Final answer
   x = 154,768.82