Finding the Fourth Proportional to 13,456.04, 18,571.72 and 7,789.84

Step by Step Solution

1. Step 1: Write the proportion equation
   13,456.04 : 18,571.72 = 7,789.84 : x
2. Step 2: Convert to fraction form
   13,456.04/18,571.72 = 7,789.84/x
3. Step 3: Cross multiply
   13,456.04x = 18,571.72 × 7,789.84
4. Step 4: Simplify right side
   13,456.04x = 144,670,727.32
5. Step 5: Solve for x
   x = 144,670,727.32/13,456.04
6. Step 6: Final answer
   x = 10,751.36