Finding the Fourth Proportional to 3,945.75, 5,922.92 and 3,931.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945.75 : 5,922.92 = 3,931.05 : x
2. Step 2: Convert to fraction form
   3,945.75/5,922.92 = 3,931.05/x
3. Step 3: Cross multiply
   3,945.75x = 5,922.92 × 3,931.05
4. Step 4: Simplify right side
   3,945.75x = 23,283,275.01
5. Step 5: Solve for x
   x = 23,283,275.01/3,945.75
6. Step 6: Final answer
   x = 5,900.85