Finding the Fourth Proportional to 12,667.11, 17,485.55 and 11,338.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,667.11 : 17,485.55 = 11,338.52 : x
2. Step 2: Convert to fraction form
   12,667.11/17,485.55 = 11,338.52/x
3. Step 3: Cross multiply
   12,667.11x = 17,485.55 × 11,338.52
4. Step 4: Simplify right side
   12,667.11x = 198,260,114.27
5. Step 5: Solve for x
   x = 198,260,114.27/12,667.11
6. Step 6: Final answer
   x = 15,651.57