Finding the Fourth Proportional to 438,111.72, 604,594.20 and 236,907.72

Step by Step Solution

1. Step 1: Write the proportion equation
   438,111.72 : 604,594.20 = 236,907.72 : x
2. Step 2: Convert to fraction form
   438,111.72/604,594.20 = 236,907.72/x
3. Step 3: Cross multiply
   438,111.72x = 604,594.20 × 236,907.72
4. Step 4: Simplify right side
   438,111.72x = 143,233,033,447.22
5. Step 5: Solve for x
   x = 143,233,033,447.22/438,111.72
6. Step 6: Final answer
   x = 326,932.67