Finding the Fourth Proportional to 5,730.89, 7,908.53 and 3,213.09

Step by Step Solution

1. Step 1: Write the proportion equation
   5,730.89 : 7,908.53 = 3,213.09 : x
2. Step 2: Convert to fraction form
   5,730.89/7,908.53 = 3,213.09/x
3. Step 3: Cross multiply
   5,730.89x = 7,908.53 × 3,213.09
4. Step 4: Simplify right side
   5,730.89x = 25,410,802.59
5. Step 5: Solve for x
   x = 25,410,802.59/5,730.89
6. Step 6: Final answer
   x = 4,434.01