Finding the Fourth Proportional to 12,687.34, 19,031.15 and 5,667.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,687.34 : 19,031.15 = 5,667.71 : x
2. Step 2: Convert to fraction form
   12,687.34/19,031.15 = 5,667.71/x
3. Step 3: Cross multiply
   12,687.34x = 19,031.15 × 5,667.71
4. Step 4: Simplify right side
   12,687.34x = 107,863,039.17
5. Step 5: Solve for x
   x = 107,863,039.17/12,687.34
6. Step 6: Final answer
   x = 8,501.63