Finding the Fourth Proportional to 13,443.39, 18,550.98 and 7,474.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,443.39 : 18,550.98 = 7,474.86 : x
2. Step 2: Convert to fraction form
   13,443.39/18,550.98 = 7,474.86/x
3. Step 3: Cross multiply
   13,443.39x = 18,550.98 × 7,474.86
4. Step 4: Simplify right side
   13,443.39x = 138,665,978.36
5. Step 5: Solve for x
   x = 138,665,978.36/13,443.39
6. Step 6: Final answer
   x = 10,314.81