Finding the Fourth Proportional to 404,915.60, 607,632.60 and 236,435.60

Step by Step Solution

1. Step 1: Write the proportion equation
   404,915.60 : 607,632.60 = 236,435.60 : x
2. Step 2: Convert to fraction form
   404,915.60/607,632.60 = 236,435.60/x
3. Step 3: Cross multiply
   404,915.60x = 607,632.60 × 236,435.60
4. Step 4: Simplify right side
   404,915.60x = 143,665,978,360.56
5. Step 5: Solve for x
   x = 143,665,978,360.56/404,915.60
6. Step 6: Final answer
   x = 354,804.75