Finding the Fourth Proportional to 12,696.30, 19,012.05 and 10,104.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,696.30 : 19,012.05 = 10,104.30 : x
2. Step 2: Convert to fraction form
   12,696.30/19,012.05 = 10,104.30/x
3. Step 3: Cross multiply
   12,696.30x = 19,012.05 × 10,104.30
4. Step 4: Simplify right side
   12,696.30x = 192,103,456.82
5. Step 5: Solve for x
   x = 192,103,456.82/12,696.30
6. Step 6: Final answer
   x = 15,130.66