Finding the Fourth Proportional to 13,168.81, 18,173 and 7,200.58

Step by Step Solution

1. Step 1: Write the proportion equation
   13,168.81 : 18,173 = 7,200.58 : x
2. Step 2: Convert to fraction form
   13,168.81/18,173 = 7,200.58/x
3. Step 3: Cross multiply
   13,168.81x = 18,173 × 7,200.58
4. Step 4: Simplify right side
   13,168.81x = 130,856,140.34
5. Step 5: Solve for x
   x = 130,856,140.34/13,168.81
6. Step 6: Final answer
   x = 9,936.82