Finding the Fourth Proportional to 3,685.86, 5,087.61 and 2,939.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,685.86 : 5,087.61 = 2,939.58 : x
2. Step 2: Convert to fraction form
   3,685.86/5,087.61 = 2,939.58/x
3. Step 3: Cross multiply
   3,685.86x = 5,087.61 × 2,939.58
4. Step 4: Simplify right side
   3,685.86x = 14,955,436.60
5. Step 5: Solve for x
   x = 14,955,436.60/3,685.86
6. Step 6: Final answer
   x = 4,057.52