Finding the Fourth Proportional to 10,940.24, 16,404.60 and 7,478.48

Step by Step Solution

1. Step 1: Write the proportion equation
   10,940.24 : 16,404.60 = 7,478.48 : x
2. Step 2: Convert to fraction form
   10,940.24/16,404.60 = 7,478.48/x
3. Step 3: Cross multiply
   10,940.24x = 16,404.60 × 7,478.48
4. Step 4: Simplify right side
   10,940.24x = 122,681,473.01
5. Step 5: Solve for x
   x = 122,681,473.01/10,940.24
6. Step 6: Final answer
   x = 11,213.78