Finding the Fourth Proportional to 3,931.16, 5,429.76 and 2,940.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931.16 : 5,429.76 = 2,940.84 : x
2. Step 2: Convert to fraction form
   3,931.16/5,429.76 = 2,940.84/x
3. Step 3: Cross multiply
   3,931.16x = 5,429.76 × 2,940.84
4. Step 4: Simplify right side
   3,931.16x = 15,968,055.40
5. Step 5: Solve for x
   x = 15,968,055.40/3,931.16
6. Step 6: Final answer
   x = 4,061.92