Finding the Fourth Proportional to 5,128.58, 7,077.82 and 3,867.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,128.58 : 7,077.82 = 3,867.42 : x
2. Step 2: Convert to fraction form
   5,128.58/7,077.82 = 3,867.42/x
3. Step 3: Cross multiply
   5,128.58x = 7,077.82 × 3,867.42
4. Step 4: Simplify right side
   5,128.58x = 27,372,902.62
5. Step 5: Solve for x
   x = 27,372,902.62/5,128.58
6. Step 6: Final answer
   x = 5,337.33