Finding the Fourth Proportional to 12,684.79, 17,484.03 and 9,535.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,684.79 : 17,484.03 = 9,535.51 : x
2. Step 2: Convert to fraction form
   12,684.79/17,484.03 = 9,535.51/x
3. Step 3: Cross multiply
   12,684.79x = 17,484.03 × 9,535.51
4. Step 4: Simplify right side
   12,684.79x = 166,719,142.91
5. Step 5: Solve for x
   x = 166,719,142.91/12,684.79
6. Step 6: Final answer
   x = 13,143.23