Finding the Fourth Proportional to 13,229.55, 18,256.71 and 7,261.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,229.55 : 18,256.71 = 7,261.31 : x
2. Step 2: Convert to fraction form
   13,229.55/18,256.71 = 7,261.31/x
3. Step 3: Cross multiply
   13,229.55x = 18,256.71 × 7,261.31
4. Step 4: Simplify right side
   13,229.55x = 132,567,594.58
5. Step 5: Solve for x
   x = 132,567,594.58/13,229.55
6. Step 6: Final answer
   x = 10,020.57