Finding the Fourth Proportional to 5,278.91, 7,917.82 and 1,383.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,278.91 : 7,917.82 = 1,383.31 : x
2. Step 2: Convert to fraction form
   5,278.91/7,917.82 = 1,383.31/x
3. Step 3: Cross multiply
   5,278.91x = 7,917.82 × 1,383.31
4. Step 4: Simplify right side
   5,278.91x = 10,952,806.02
5. Step 5: Solve for x
   x = 10,952,806.02/5,278.91
6. Step 6: Final answer
   x = 2,074.83