Finding the Fourth Proportional to 209,108.42, 313,662.89 and 57,306.76

Step by Step Solution

1. Step 1: Write the proportion equation
   209,108.42 : 313,662.89 = 57,306.76 : x
2. Step 2: Convert to fraction form
   209,108.42/313,662.89 = 57,306.76/x
3. Step 3: Cross multiply
   209,108.42x = 313,662.89 × 57,306.76
4. Step 4: Simplify right side
   209,108.42x = 17,975,002,103.29
5. Step 5: Solve for x
   x = 17,975,002,103.29/209,108.42
6. Step 6: Final answer
   x = 85,960.20