Finding the Fourth Proportional to 13,788.27, 19,019.95 and 8,479.33

Step by Step Solution

1. Step 1: Write the proportion equation
   13,788.27 : 19,019.95 = 8,479.33 : x
2. Step 2: Convert to fraction form
   13,788.27/19,019.95 = 8,479.33/x
3. Step 3: Cross multiply
   13,788.27x = 19,019.95 × 8,479.33
4. Step 4: Simplify right side
   13,788.27x = 161,276,363.89
5. Step 5: Solve for x
   x = 161,276,363.89/13,788.27
6. Step 6: Final answer
   x = 11,696.64