Finding the Fourth Proportional to 13,103.42, 18,081.81 and 7,438.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,103.42 : 18,081.81 = 7,438.28 : x
2. Step 2: Convert to fraction form
   13,103.42/18,081.81 = 7,438.28/x
3. Step 3: Cross multiply
   13,103.42x = 18,081.81 × 7,438.28
4. Step 4: Simplify right side
   13,103.42x = 134,497,475.28
5. Step 5: Solve for x
   x = 134,497,475.28/13,103.42
6. Step 6: Final answer
   x = 10,264.31