Finding the Fourth Proportional to 12,669.33, 18,993.77 and 5,279.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,669.33 : 18,993.77 = 5,279.36 : x
2. Step 2: Convert to fraction form
   12,669.33/18,993.77 = 5,279.36/x
3. Step 3: Cross multiply
   12,669.33x = 18,993.77 × 5,279.36
4. Step 4: Simplify right side
   12,669.33x = 100,274,828.22
5. Step 5: Solve for x
   x = 100,274,828.22/12,669.33
6. Step 6: Final answer
   x = 7,914.77