Finding the Fourth Proportional to 5,119.37, 7,064.82 and 3,131.02

Step by Step Solution

1. Step 1: Write the proportion equation
   5,119.37 : 7,064.82 = 3,131.02 : x
2. Step 2: Convert to fraction form
   5,119.37/7,064.82 = 3,131.02/x
3. Step 3: Cross multiply
   5,119.37x = 7,064.82 × 3,131.02
4. Step 4: Simplify right side
   5,119.37x = 22,120,101.55
5. Step 5: Solve for x
   x = 22,120,101.55/5,119.37
6. Step 6: Final answer
   x = 4,320.87