Finding the Fourth Proportional to 404,915.10, 607,631.85 and 236,435.10

Step by Step Solution

1. Step 1: Write the proportion equation
   404,915.10 : 607,631.85 = 236,435.10 : x
2. Step 2: Convert to fraction form
   404,915.10/607,631.85 = 236,435.10/x
3. Step 3: Cross multiply
   404,915.10x = 607,631.85 × 236,435.10
4. Step 4: Simplify right side
   404,915.10x = 143,665,497,217.94
5. Step 5: Solve for x
   x = 143,665,497,217.94/404,915.10
6. Step 6: Final answer
   x = 354,804.00