Finding the Fourth Proportional to 5,182.38, 7,773.43 and 1,286.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,182.38 : 7,773.43 = 1,286.78 : x
2. Step 2: Convert to fraction form
   5,182.38/7,773.43 = 1,286.78/x
3. Step 3: Cross multiply
   5,182.38x = 7,773.43 × 1,286.78
4. Step 4: Simplify right side
   5,182.38x = 10,002,671.60
5. Step 5: Solve for x
   x = 10,002,671.60/5,182.38
6. Step 6: Final answer
   x = 1,930.13