Finding the Fourth Proportional to 438,019.31, 604,467.56 and 236,815.31

Step by Step Solution

1. Step 1: Write the proportion equation
   438,019.31 : 604,467.56 = 236,815.31 : x
2. Step 2: Convert to fraction form
   438,019.31/604,467.56 = 236,815.31/x
3. Step 3: Cross multiply
   438,019.31x = 604,467.56 × 236,815.31
4. Step 4: Simplify right side
   438,019.31x = 143,147,174,709.55
5. Step 5: Solve for x
   x = 143,147,174,709.55/438,019.31
6. Step 6: Final answer
   x = 326,805.62