Finding the Fourth Proportional to 7,131.37, 10,691.28 and 2,974.49

Step by Step Solution

1. Step 1: Write the proportion equation
   7,131.37 : 10,691.28 = 2,974.49 : x
2. Step 2: Convert to fraction form
   7,131.37/10,691.28 = 2,974.49/x
3. Step 3: Cross multiply
   7,131.37x = 10,691.28 × 2,974.49
4. Step 4: Simplify right side
   7,131.37x = 31,801,105.45
5. Step 5: Solve for x
   x = 31,801,105.45/7,131.37
6. Step 6: Final answer
   x = 4,459.33