Finding the Fourth Proportional to 404,870.10, 607,564.35 and 236,390.10

Step by Step Solution

1. Step 1: Write the proportion equation
   404,870.10 : 607,564.35 = 236,390.10 : x
2. Step 2: Convert to fraction form
   404,870.10/607,564.35 = 236,390.10/x
3. Step 3: Cross multiply
   404,870.10x = 607,564.35 × 236,390.10
4. Step 4: Simplify right side
   404,870.10x = 143,622,197,452.94
5. Step 5: Solve for x
   x = 143,622,197,452.94/404,870.10
6. Step 6: Final answer
   x = 354,736.49