Finding the Fourth Proportional to 12,729.94, 19,085.31 and 8,348.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,729.94 : 19,085.31 = 8,348.50 : x
2. Step 2: Convert to fraction form
   12,729.94/19,085.31 = 8,348.50/x
3. Step 3: Cross multiply
   12,729.94x = 19,085.31 × 8,348.50
4. Step 4: Simplify right side
   12,729.94x = 159,333,710.54
5. Step 5: Solve for x
   x = 159,333,710.54/12,729.94
6. Step 6: Final answer
   x = 12,516.45