Finding the Fourth Proportional to 5,499.69, 7,579.39 and 3,906.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,499.69 : 7,579.39 = 3,906.40 : x
2. Step 2: Convert to fraction form
   5,499.69/7,579.39 = 3,906.40/x
3. Step 3: Cross multiply
   5,499.69x = 7,579.39 × 3,906.40
4. Step 4: Simplify right side
   5,499.69x = 29,608,129.10
5. Step 5: Solve for x
   x = 29,608,129.10/5,499.69
6. Step 6: Final answer
   x = 5,383.60