Finding the Fourth Proportional to 12,731.49, 19,085.69 and 6,881.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,731.49 : 19,085.69 = 6,881.27 : x
2. Step 2: Convert to fraction form
   12,731.49/19,085.69 = 6,881.27/x
3. Step 3: Cross multiply
   12,731.49x = 19,085.69 × 6,881.27
4. Step 4: Simplify right side
   12,731.49x = 131,333,707.80
5. Step 5: Solve for x
   x = 131,333,707.80/12,731.49
6. Step 6: Final answer
   x = 10,315.66