Finding the Fourth Proportional to 12,743.43, 17,586.81 and 7,707.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,743.43 : 17,586.81 = 7,707.86 : x
2. Step 2: Convert to fraction form
   12,743.43/17,586.81 = 7,707.86/x
3. Step 3: Cross multiply
   12,743.43x = 17,586.81 × 7,707.86
4. Step 4: Simplify right side
   12,743.43x = 135,556,581.39
5. Step 5: Solve for x
   x = 135,556,581.39/12,743.43
6. Step 6: Final answer
   x = 10,637.37