Finding the Fourth Proportional to 8,389.42, 12,573.27 and 3,453.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,389.42 : 12,573.27 = 3,453.34 : x
2. Step 2: Convert to fraction form
   8,389.42/12,573.27 = 3,453.34/x
3. Step 3: Cross multiply
   8,389.42x = 12,573.27 × 3,453.34
4. Step 4: Simplify right side
   8,389.42x = 43,419,776.22
5. Step 5: Solve for x
   x = 43,419,776.22/8,389.42
6. Step 6: Final answer
   x = 5,175.54