Finding the Fourth Proportional to 12,788.82, 19,185.84 and 5,393.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,788.82 : 19,185.84 = 5,393.30 : x
2. Step 2: Convert to fraction form
   12,788.82/19,185.84 = 5,393.30/x
3. Step 3: Cross multiply
   12,788.82x = 19,185.84 × 5,393.30
4. Step 4: Simplify right side
   12,788.82x = 103,474,894.94
5. Step 5: Solve for x
   x = 103,474,894.94/12,788.82
6. Step 6: Final answer
   x = 8,091.04