Finding the Fourth Proportional to 404,128.66, 606,127.71 and 190,896.10

Step by Step Solution

1. Step 1: Write the proportion equation
   404,128.66 : 606,127.71 = 190,896.10 : x
2. Step 2: Convert to fraction form
   404,128.66/606,127.71 = 190,896.10/x
3. Step 3: Cross multiply
   404,128.66x = 606,127.71 × 190,896.10
4. Step 4: Simplify right side
   404,128.66x = 115,707,415,940.93
5. Step 5: Solve for x
   x = 115,707,415,940.93/404,128.66
6. Step 6: Final answer
   x = 286,313.31