Finding the Fourth Proportional to 13,362.78, 18,442.60 and 7,696.43

Step by Step Solution

1. Step 1: Write the proportion equation
   13,362.78 : 18,442.60 = 7,696.43 : x
2. Step 2: Convert to fraction form
   13,362.78/18,442.60 = 7,696.43/x
3. Step 3: Cross multiply
   13,362.78x = 18,442.60 × 7,696.43
4. Step 4: Simplify right side
   13,362.78x = 141,942,049.22
5. Step 5: Solve for x
   x = 141,942,049.22/13,362.78
6. Step 6: Final answer
   x = 10,622.19