Finding the Fourth Proportional to 13,209.45, 18,229.59 and 7,903.23

Step by Step Solution

1. Step 1: Write the proportion equation
   13,209.45 : 18,229.59 = 7,903.23 : x
2. Step 2: Convert to fraction form
   13,209.45/18,229.59 = 7,903.23/x
3. Step 3: Cross multiply
   13,209.45x = 18,229.59 × 7,903.23
4. Step 4: Simplify right side
   13,209.45x = 144,072,642.58
5. Step 5: Solve for x
   x = 144,072,642.58/13,209.45
6. Step 6: Final answer
   x = 10,906.79