Finding the Fourth Proportional to 16,818.31, 25,227.39 and 5,131.49

Step by Step Solution

1. Step 1: Write the proportion equation
   16,818.31 : 25,227.39 = 5,131.49 : x
2. Step 2: Convert to fraction form
   16,818.31/25,227.39 = 5,131.49/x
3. Step 3: Cross multiply
   16,818.31x = 25,227.39 × 5,131.49
4. Step 4: Simplify right side
   16,818.31x = 129,454,099.51
5. Step 5: Solve for x
   x = 129,454,099.51/16,818.31
6. Step 6: Final answer
   x = 7,697.21