Finding the Fourth Proportional to 13,168.32, 18,171.12 and 7,200.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,168.32 : 18,171.12 = 7,200.04 : x
2. Step 2: Convert to fraction form
   13,168.32/18,171.12 = 7,200.04/x
3. Step 3: Cross multiply
   13,168.32x = 18,171.12 × 7,200.04
4. Step 4: Simplify right side
   13,168.32x = 130,832,790.84
5. Step 5: Solve for x
   x = 130,832,790.84/13,168.32
6. Step 6: Final answer
   x = 9,935.42