Finding the Fourth Proportional to 12,788.38, 19,200.24 and 8,830.35

Step by Step Solution

1. Step 1: Write the proportion equation
   12,788.38 : 19,200.24 = 8,830.35 : x
2. Step 2: Convert to fraction form
   12,788.38/19,200.24 = 8,830.35/x
3. Step 3: Cross multiply
   12,788.38x = 19,200.24 × 8,830.35
4. Step 4: Simplify right side
   12,788.38x = 169,544,839.28
5. Step 5: Solve for x
   x = 169,544,839.28/12,788.38
6. Step 6: Final answer
   x = 13,257.72