Finding the Fourth Proportional to 5,591.69, 7,708.41 and 3,907.88

Step by Step Solution

1. Step 1: Write the proportion equation
   5,591.69 : 7,708.41 = 3,907.88 : x
2. Step 2: Convert to fraction form
   5,591.69/7,708.41 = 3,907.88/x
3. Step 3: Cross multiply
   5,591.69x = 7,708.41 × 3,907.88
4. Step 4: Simplify right side
   5,591.69x = 30,123,502.73
5. Step 5: Solve for x
   x = 30,123,502.73/5,591.69
6. Step 6: Final answer
   x = 5,387.19