Finding the Fourth Proportional to 13,571.69, 18,728.33 and 7,906.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,571.69 : 18,728.33 = 7,906.59 : x
2. Step 2: Convert to fraction form
   13,571.69/18,728.33 = 7,906.59/x
3. Step 3: Cross multiply
   13,571.69x = 18,728.33 × 7,906.59
4. Step 4: Simplify right side
   13,571.69x = 148,077,187.16
5. Step 5: Solve for x
   x = 148,077,187.16/13,571.69
6. Step 6: Final answer
   x = 10,910.74