Finding the Fourth Proportional to 4,839.91, 6,677.15 and 3,160.78

Step by Step Solution

1. Step 1: Write the proportion equation
   4,839.91 : 6,677.15 = 3,160.78 : x
2. Step 2: Convert to fraction form
   4,839.91/6,677.15 = 3,160.78/x
3. Step 3: Cross multiply
   4,839.91x = 6,677.15 × 3,160.78
4. Step 4: Simplify right side
   4,839.91x = 21,105,002.18
5. Step 5: Solve for x
   x = 21,105,002.18/4,839.91
6. Step 6: Final answer
   x = 4,360.62