Finding the Fourth Proportional to 404,923.10, 607,643.85 and 236,443.10

Step by Step Solution

1. Step 1: Write the proportion equation
   404,923.10 : 607,643.85 = 236,443.10 : x
2. Step 2: Convert to fraction form
   404,923.10/607,643.85 = 236,443.10/x
3. Step 3: Cross multiply
   404,923.10x = 607,643.85 × 236,443.10
4. Step 4: Simplify right side
   404,923.10x = 143,673,195,589.94
5. Step 5: Solve for x
   x = 143,673,195,589.94/404,923.10
6. Step 6: Final answer
   x = 354,816.00