Finding the Fourth Proportional to 13,485.24, 18,609.30 and 7,516.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,485.24 : 18,609.30 = 7,516.89 : x
2. Step 2: Convert to fraction form
   13,485.24/18,609.30 = 7,516.89/x
3. Step 3: Cross multiply
   13,485.24x = 18,609.30 × 7,516.89
4. Step 4: Simplify right side
   13,485.24x = 139,884,061.08
5. Step 5: Solve for x
   x = 139,884,061.08/13,485.24
6. Step 6: Final answer
   x = 10,373.12