Finding the Fourth Proportional to 5,488.86, 7,574.64 and 3,131.01

Step by Step Solution

1. Step 1: Write the proportion equation
   5,488.86 : 7,574.64 = 3,131.01 : x
2. Step 2: Convert to fraction form
   5,488.86/7,574.64 = 3,131.01/x
3. Step 3: Cross multiply
   5,488.86x = 7,574.64 × 3,131.01
4. Step 4: Simplify right side
   5,488.86x = 23,716,273.59
5. Step 5: Solve for x
   x = 23,716,273.59/5,488.86
6. Step 6: Final answer
   x = 4,320.80