Finding the Fourth Proportional to 13,603.56, 18,772.99 and 7,942.24

Step by Step Solution

1. Step 1: Write the proportion equation
   13,603.56 : 18,772.99 = 7,942.24 : x
2. Step 2: Convert to fraction form
   13,603.56/18,772.99 = 7,942.24/x
3. Step 3: Cross multiply
   13,603.56x = 18,772.99 × 7,942.24
4. Step 4: Simplify right side
   13,603.56x = 149,099,505.45
5. Step 5: Solve for x
   x = 149,099,505.45/13,603.56
6. Step 6: Final answer
   x = 10,960.33