Finding the Fourth Proportional to 12,743.08, 17,586.56 and 7,439.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,743.08 : 17,586.56 = 7,439.61 : x
2. Step 2: Convert to fraction form
   12,743.08/17,586.56 = 7,439.61/x
3. Step 3: Cross multiply
   12,743.08x = 17,586.56 × 7,439.61
4. Step 4: Simplify right side
   12,743.08x = 130,837,147.64
5. Step 5: Solve for x
   x = 130,837,147.64/12,743.08
6. Step 6: Final answer
   x = 10,267.31