Finding the Fourth Proportional to 12,392.81, 17,105.24 and 7,089.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,392.81 : 17,105.24 = 7,089.29 : x
2. Step 2: Convert to fraction form
   12,392.81/17,105.24 = 7,089.29/x
3. Step 3: Cross multiply
   12,392.81x = 17,105.24 × 7,089.29
4. Step 4: Simplify right side
   12,392.81x = 121,263,971.43
5. Step 5: Solve for x
   x = 121,263,971.43/12,392.81
6. Step 6: Final answer
   x = 9,785.03