Finding the Fourth Proportional to 5,604.33, 7,720.82 and 3,899.91

Step by Step Solution

1. Step 1: Write the proportion equation
   5,604.33 : 7,720.82 = 3,899.91 : x
2. Step 2: Convert to fraction form
   5,604.33/7,720.82 = 3,899.91/x
3. Step 3: Cross multiply
   5,604.33x = 7,720.82 × 3,899.91
4. Step 4: Simplify right side
   5,604.33x = 30,110,464.52
5. Step 5: Solve for x
   x = 30,110,464.52/5,604.33
6. Step 6: Final answer
   x = 5,372.71