Finding the Fourth Proportional to 13,103.50, 18,082.56 and 7,135.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,103.50 : 18,082.56 = 7,135.28 : x
2. Step 2: Convert to fraction form
   13,103.50/18,082.56 = 7,135.28/x
3. Step 3: Cross multiply
   13,103.50x = 18,082.56 × 7,135.28
4. Step 4: Simplify right side
   13,103.50x = 129,024,128.72
5. Step 5: Solve for x
   x = 129,024,128.72/13,103.50
6. Step 6: Final answer
   x = 9,846.54