Finding the Fourth Proportional to 419,581.22, 579,010.88 and 238,300.79

Step by Step Solution

1. Step 1: Write the proportion equation
   419,581.22 : 579,010.88 = 238,300.79 : x
2. Step 2: Convert to fraction form
   419,581.22/579,010.88 = 238,300.79/x
3. Step 3: Cross multiply
   419,581.22x = 579,010.88 × 238,300.79
4. Step 4: Simplify right side
   419,581.22x = 137,978,747,823.29
5. Step 5: Solve for x
   x = 137,978,747,823.29/419,581.22
6. Step 6: Final answer
   x = 328,848.73