Finding the Fourth Proportional to 12,309.24, 18,434.43 and 7,099.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,309.24 : 18,434.43 = 7,099.32 : x
2. Step 2: Convert to fraction form
   12,309.24/18,434.43 = 7,099.32/x
3. Step 3: Cross multiply
   12,309.24x = 18,434.43 × 7,099.32
4. Step 4: Simplify right side
   12,309.24x = 130,871,917.59
5. Step 5: Solve for x
   x = 130,871,917.59/12,309.24
6. Step 6: Final answer
   x = 10,632.01