Finding the Fourth Proportional to 5,148.90, 7,105.91 and 4,308.12

Step by Step Solution

1. Step 1: Write the proportion equation
   5,148.90 : 7,105.91 = 4,308.12 : x
2. Step 2: Convert to fraction form
   5,148.90/7,105.91 = 4,308.12/x
3. Step 3: Cross multiply
   5,148.90x = 7,105.91 × 4,308.12
4. Step 4: Simplify right side
   5,148.90x = 30,613,112.99
5. Step 5: Solve for x
   x = 30,613,112.99/5,148.90
6. Step 6: Final answer
   x = 5,945.56