Finding the Fourth Proportional to 12,966.27, 19,447.57 and 7,401.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,966.27 : 19,447.57 = 7,401.57 : x
2. Step 2: Convert to fraction form
   12,966.27/19,447.57 = 7,401.57/x
3. Step 3: Cross multiply
   12,966.27x = 19,447.57 × 7,401.57
4. Step 4: Simplify right side
   12,966.27x = 143,942,550.68
5. Step 5: Solve for x
   x = 143,942,550.68/12,966.27
6. Step 6: Final answer
   x = 11,101.31