Finding the Fourth Proportional to 5,488.98, 7,574.94 and 3,131.07

Step by Step Solution

1. Step 1: Write the proportion equation
   5,488.98 : 7,574.94 = 3,131.07 : x
2. Step 2: Convert to fraction form
   5,488.98/7,574.94 = 3,131.07/x
3. Step 3: Cross multiply
   5,488.98x = 7,574.94 × 3,131.07
4. Step 4: Simplify right side
   5,488.98x = 23,717,667.39
5. Step 5: Solve for x
   x = 23,717,667.39/5,488.98
6. Step 6: Final answer
   x = 4,320.96