Finding the Fourth Proportional to 190,287.63, 284,976.72 and 105,838.02

Step by Step Solution

1. Step 1: Write the proportion equation
   190,287.63 : 284,976.72 = 105,838.02 : x
2. Step 2: Convert to fraction form
   190,287.63/284,976.72 = 105,838.02/x
3. Step 3: Cross multiply
   190,287.63x = 284,976.72 × 105,838.02
4. Step 4: Simplify right side
   190,287.63x = 30,161,371,790.89
5. Step 5: Solve for x
   x = 30,161,371,790.89/190,287.63
6. Step 6: Final answer
   x = 158,504.11