Finding the Fourth Proportional to 13,142.94, 19,679.85 and 10,067.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,142.94 : 19,679.85 = 10,067.10 : x
2. Step 2: Convert to fraction form
   13,142.94/19,679.85 = 10,067.10/x
3. Step 3: Cross multiply
   13,142.94x = 19,679.85 × 10,067.10
4. Step 4: Simplify right side
   13,142.94x = 198,119,017.94
5. Step 5: Solve for x
   x = 198,119,017.94/13,142.94
6. Step 6: Final answer
   x = 15,074.18