Finding the Fourth Proportional to 3,946.89, 5,917.89 and 1,865.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,946.89 : 5,917.89 = 1,865.61 : x
2. Step 2: Convert to fraction form
   3,946.89/5,917.89 = 1,865.61/x
3. Step 3: Cross multiply
   3,946.89x = 5,917.89 × 1,865.61
4. Step 4: Simplify right side
   3,946.89x = 11,040,474.76
5. Step 5: Solve for x
   x = 11,040,474.76/3,946.89
6. Step 6: Final answer
   x = 2,797.26