Finding the Fourth Proportional to 9,072.96, 13,609.20 and 2,499.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,072.96 : 13,609.20 = 2,499.60 : x
2. Step 2: Convert to fraction form
   9,072.96/13,609.20 = 2,499.60/x
3. Step 3: Cross multiply
   9,072.96x = 13,609.20 × 2,499.60
4. Step 4: Simplify right side
   9,072.96x = 34,017,556.32
5. Step 5: Solve for x
   x = 34,017,556.32/9,072.96
6. Step 6: Final answer
   x = 3,749.33