Finding the Fourth Proportional to 13,581.55, 18,743.33 and 7,615.14

Step by Step Solution

1. Step 1: Write the proportion equation
   13,581.55 : 18,743.33 = 7,615.14 : x
2. Step 2: Convert to fraction form
   13,581.55/18,743.33 = 7,615.14/x
3. Step 3: Cross multiply
   13,581.55x = 18,743.33 × 7,615.14
4. Step 4: Simplify right side
   13,581.55x = 142,733,072.50
5. Step 5: Solve for x
   x = 142,733,072.50/13,581.55
6. Step 6: Final answer
   x = 10,509.34