Finding the Fourth Proportional to 3,942.80, 5,885.34 and 3,475.74

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942.80 : 5,885.34 = 3,475.74 : x
2. Step 2: Convert to fraction form
   3,942.80/5,885.34 = 3,475.74/x
3. Step 3: Cross multiply
   3,942.80x = 5,885.34 × 3,475.74
4. Step 4: Simplify right side
   3,942.80x = 20,455,911.65
5. Step 5: Solve for x
   x = 20,455,911.65/3,942.80
6. Step 6: Final answer
   x = 5,188.18