Finding the Fourth Proportional to 3,942.15, 5,914.17 and 1,310.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942.15 : 5,914.17 = 1,310.55 : x
2. Step 2: Convert to fraction form
   3,942.15/5,914.17 = 1,310.55/x
3. Step 3: Cross multiply
   3,942.15x = 5,914.17 × 1,310.55
4. Step 4: Simplify right side
   3,942.15x = 7,750,815.49
5. Step 5: Solve for x
   x = 7,750,815.49/3,942.15
6. Step 6: Final answer
   x = 1,966.14