Finding the Fourth Proportional to 144,238.78, 199,049.25 and 86,911.30

Step by Step Solution

1. Step 1: Write the proportion equation
   144,238.78 : 199,049.25 = 86,911.30 : x
2. Step 2: Convert to fraction form
   144,238.78/199,049.25 = 86,911.30/x
3. Step 3: Cross multiply
   144,238.78x = 199,049.25 × 86,911.30
4. Step 4: Simplify right side
   144,238.78x = 17,299,629,081.53
5. Step 5: Solve for x
   x = 17,299,629,081.53/144,238.78
6. Step 6: Final answer
   x = 119,937.43