Finding the Fourth Proportional to 13,407.72, 18,504.86 and 7,441.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,407.72 : 18,504.86 = 7,441.31 : x
2. Step 2: Convert to fraction form
   13,407.72/18,504.86 = 7,441.31/x
3. Step 3: Cross multiply
   13,407.72x = 18,504.86 × 7,441.31
4. Step 4: Simplify right side
   13,407.72x = 137,700,399.77
5. Step 5: Solve for x
   x = 137,700,399.77/13,407.72
6. Step 6: Final answer
   x = 10,270.23