Finding the Fourth Proportional to 5,231.22, 7,218.89 and 2,993.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,231.22 : 7,218.89 = 2,993.31 : x
2. Step 2: Convert to fraction form
   5,231.22/7,218.89 = 2,993.31/x
3. Step 3: Cross multiply
   5,231.22x = 7,218.89 × 2,993.31
4. Step 4: Simplify right side
   5,231.22x = 21,608,360.66
5. Step 5: Solve for x
   x = 21,608,360.66/5,231.22
6. Step 6: Final answer
   x = 4,130.65