Finding the Fourth Proportional to 8,389.10, 12,572.72 and 3,453.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,389.10 : 12,572.72 = 3,453.16 : x
2. Step 2: Convert to fraction form
   8,389.10/12,572.72 = 3,453.16/x
3. Step 3: Cross multiply
   8,389.10x = 12,572.72 × 3,453.16
4. Step 4: Simplify right side
   8,389.10x = 43,415,613.80
5. Step 5: Solve for x
   x = 43,415,613.80/8,389.10
6. Step 6: Final answer
   x = 5,175.24