Finding the Fourth Proportional to 8,613.72, 12,918.12 and 2,372.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,613.72 : 12,918.12 = 2,372.16 : x
2. Step 2: Convert to fraction form
   8,613.72/12,918.12 = 2,372.16/x
3. Step 3: Cross multiply
   8,613.72x = 12,918.12 × 2,372.16
4. Step 4: Simplify right side
   8,613.72x = 30,643,847.54
5. Step 5: Solve for x
   x = 30,643,847.54/8,613.72
6. Step 6: Final answer
   x = 3,557.56