Finding the Fourth Proportional to 13,281.56, 18,328.59 and 7,616.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,281.56 : 18,328.59 = 7,616.42 : x
2. Step 2: Convert to fraction form
   13,281.56/18,328.59 = 7,616.42/x
3. Step 3: Cross multiply
   13,281.56x = 18,328.59 × 7,616.42
4. Step 4: Simplify right side
   13,281.56x = 139,598,147.80
5. Step 5: Solve for x
   x = 139,598,147.80/13,281.56
6. Step 6: Final answer
   x = 10,510.68