Finding the Fourth Proportional to 2,574.36, 3,861.89 and 930.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,574.36 : 3,861.89 = 930.69 : x
2. Step 2: Convert to fraction form
   2,574.36/3,861.89 = 930.69/x
3. Step 3: Cross multiply
   2,574.36x = 3,861.89 × 930.69
4. Step 4: Simplify right side
   2,574.36x = 3,594,217.75
5. Step 5: Solve for x
   x = 3,594,217.75/2,574.36
6. Step 6: Final answer
   x = 1,396.16