Finding the Fourth Proportional to 13,167.32, 18,171.42 and 7,199.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,167.32 : 18,171.42 = 7,199.42 : x
2. Step 2: Convert to fraction form
   13,167.32/18,171.42 = 7,199.42/x
3. Step 3: Cross multiply
   13,167.32x = 18,171.42 × 7,199.42
4. Step 4: Simplify right side
   13,167.32x = 130,823,684.58
5. Step 5: Solve for x
   x = 130,823,684.58/13,167.32
6. Step 6: Final answer
   x = 9,935.48