Finding the Fourth Proportional to 3,940.24, 5,910.42 and 3,156.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940.24 : 5,910.42 = 3,156.58 : x
2. Step 2: Convert to fraction form
   3,940.24/5,910.42 = 3,156.58/x
3. Step 3: Cross multiply
   3,940.24x = 5,910.42 × 3,156.58
4. Step 4: Simplify right side
   3,940.24x = 18,656,713.56
5. Step 5: Solve for x
   x = 18,656,713.56/3,940.24
6. Step 6: Final answer
   x = 4,734.92