Finding the Fourth Proportional to 12,368.72, 18,550.20 and 5,788.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,368.72 : 18,550.20 = 5,788.64 : x
2. Step 2: Convert to fraction form
   12,368.72/18,550.20 = 5,788.64/x
3. Step 3: Cross multiply
   12,368.72x = 18,550.20 × 5,788.64
4. Step 4: Simplify right side
   12,368.72x = 107,380,429.73
5. Step 5: Solve for x
   x = 107,380,429.73/12,368.72
6. Step 6: Final answer
   x = 8,681.61