Finding the Fourth Proportional to 439,930.72, 607,104.88 and 238,726.72

Step by Step Solution

1. Step 1: Write the proportion equation
   439,930.72 : 607,104.88 = 238,726.72 : x
2. Step 2: Convert to fraction form
   439,930.72/607,104.88 = 238,726.72/x
3. Step 3: Cross multiply
   439,930.72x = 607,104.88 × 238,726.72
4. Step 4: Simplify right side
   439,930.72x = 144,932,156,698.39
5. Step 5: Solve for x
   x = 144,932,156,698.39/439,930.72
6. Step 6: Final answer
   x = 329,443.14