Finding the Fourth Proportional to 13,613.37, 18,785.52 and 7,645.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,613.37 : 18,785.52 = 7,645.59 : x
2. Step 2: Convert to fraction form
   13,613.37/18,785.52 = 7,645.59/x
3. Step 3: Cross multiply
   13,613.37x = 18,785.52 × 7,645.59
4. Step 4: Simplify right side
   13,613.37x = 143,626,383.86
5. Step 5: Solve for x
   x = 143,626,383.86/13,613.37
6. Step 6: Final answer
   x = 10,550.39