Finding the Fourth Proportional to 439,978.34, 659,969.94 and 159,488.30

Step by Step Solution

1. Step 1: Write the proportion equation
   439,978.34 : 659,969.94 = 159,488.30 : x
2. Step 2: Convert to fraction form
   439,978.34/659,969.94 = 159,488.30/x
3. Step 3: Cross multiply
   439,978.34x = 659,969.94 × 159,488.30
4. Step 4: Simplify right side
   439,978.34x = 105,257,483,781.70
5. Step 5: Solve for x
   x = 105,257,483,781.70/439,978.34
6. Step 6: Final answer
   x = 239,233.33