Finding the Fourth Proportional to 2,586.21, 3,879.39 and 943.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,586.21 : 3,879.39 = 943.98 : x
2. Step 2: Convert to fraction form
   2,586.21/3,879.39 = 943.98/x
3. Step 3: Cross multiply
   2,586.21x = 3,879.39 × 943.98
4. Step 4: Simplify right side
   2,586.21x = 3,662,066.57
5. Step 5: Solve for x
   x = 3,662,066.57/2,586.21
6. Step 6: Final answer
   x = 1,416.00