Finding the Fourth Proportional to 13,020.55, 17,968.37 and 7,355.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,020.55 : 17,968.37 = 7,355.31 : x
2. Step 2: Convert to fraction form
   13,020.55/17,968.37 = 7,355.31/x
3. Step 3: Cross multiply
   13,020.55x = 17,968.37 × 7,355.31
4. Step 4: Simplify right side
   13,020.55x = 132,162,928.46
5. Step 5: Solve for x
   x = 132,162,928.46/13,020.55
6. Step 6: Final answer
   x = 10,150.33