Finding the Fourth Proportional to 3,959.72, 5,939.62 and 1,185.74

Step by Step Solution

1. Step 1: Write the proportion equation
   3,959.72 : 5,939.62 = 1,185.74 : x
2. Step 2: Convert to fraction form
   3,959.72/5,939.62 = 1,185.74/x
3. Step 3: Cross multiply
   3,959.72x = 5,939.62 × 1,185.74
4. Step 4: Simplify right side
   3,959.72x = 7,042,845.02
5. Step 5: Solve for x
   x = 7,042,845.02/3,959.72
6. Step 6: Final answer
   x = 1,778.62