Finding the Fourth Proportional to 12,681.27, 19,011.59 and 5,291.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,681.27 : 19,011.59 = 5,291.23 : x
2. Step 2: Convert to fraction form
   12,681.27/19,011.59 = 5,291.23/x
3. Step 3: Cross multiply
   12,681.27x = 19,011.59 × 5,291.23
4. Step 4: Simplify right side
   12,681.27x = 100,594,668.90
5. Step 5: Solve for x
   x = 100,594,668.90/12,681.27
6. Step 6: Final answer
   x = 7,932.54