Finding the Fourth Proportional to 248,024.69, 342,277.71 and 139,153.10

Step by Step Solution

1. Step 1: Write the proportion equation
   248,024.69 : 342,277.71 = 139,153.10 : x
2. Step 2: Convert to fraction form
   248,024.69/342,277.71 = 139,153.10/x
3. Step 3: Cross multiply
   248,024.69x = 342,277.71 × 139,153.10
4. Step 4: Simplify right side
   248,024.69x = 47,629,002,696.01
5. Step 5: Solve for x
   x = 47,629,002,696.01/248,024.69
6. Step 6: Final answer
   x = 192,033.32