Finding the Fourth Proportional to 5,105.25, 7,045.25 and 3,115.49

Step by Step Solution

1. Step 1: Write the proportion equation
   5,105.25 : 7,045.25 = 3,115.49 : x
2. Step 2: Convert to fraction form
   5,105.25/7,045.25 = 3,115.49/x
3. Step 3: Cross multiply
   5,105.25x = 7,045.25 × 3,115.49
4. Step 4: Simplify right side
   5,105.25x = 21,949,355.12
5. Step 5: Solve for x
   x = 21,949,355.12/5,105.25
6. Step 6: Final answer
   x = 4,299.37