Finding the Fourth Proportional to 13,412.39, 18,508.86 and 7,444.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,412.39 : 18,508.86 = 7,444.31 : x
2. Step 2: Convert to fraction form
   13,412.39/18,508.86 = 7,444.31/x
3. Step 3: Cross multiply
   13,412.39x = 18,508.86 × 7,444.31
4. Step 4: Simplify right side
   13,412.39x = 137,785,696.37
5. Step 5: Solve for x
   x = 137,785,696.37/13,412.39
6. Step 6: Final answer
   x = 10,273.02