Finding the Fourth Proportional to 12,300.96, 16,977.68 and 11,550.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,300.96 : 16,977.68 = 11,550.72 : x
2. Step 2: Convert to fraction form
   12,300.96/16,977.68 = 11,550.72/x
3. Step 3: Cross multiply
   12,300.96x = 16,977.68 × 11,550.72
4. Step 4: Simplify right side
   12,300.96x = 196,104,427.93
5. Step 5: Solve for x
   x = 196,104,427.93/12,300.96
6. Step 6: Final answer
   x = 15,942.21