Finding the Fourth Proportional to 13,120.56, 18,105.75 and 7,454.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,120.56 : 18,105.75 = 7,454.52 : x
2. Step 2: Convert to fraction form
   13,120.56/18,105.75 = 7,454.52/x
3. Step 3: Cross multiply
   13,120.56x = 18,105.75 × 7,454.52
4. Step 4: Simplify right side
   13,120.56x = 134,969,675.49
5. Step 5: Solve for x
   x = 134,969,675.49/13,120.56
6. Step 6: Final answer
   x = 10,286.88