Finding the Fourth Proportional to 12,818.49, 17,684.78 and 7,511.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,818.49 : 17,684.78 = 7,511.37 : x
2. Step 2: Convert to fraction form
   12,818.49/17,684.78 = 7,511.37/x
3. Step 3: Cross multiply
   12,818.49x = 17,684.78 × 7,511.37
4. Step 4: Simplify right side
   12,818.49x = 132,836,864.33
5. Step 5: Solve for x
   x = 132,836,864.33/12,818.49
6. Step 6: Final answer
   x = 10,362.91