Finding the Fourth Proportional to 279,978.22, 386,355.99 and 159,103.54

Step by Step Solution

1. Step 1: Write the proportion equation
   279,978.22 : 386,355.99 = 159,103.54 : x
2. Step 2: Convert to fraction form
   279,978.22/386,355.99 = 159,103.54/x
3. Step 3: Cross multiply
   279,978.22x = 386,355.99 × 159,103.54
4. Step 4: Simplify right side
   279,978.22x = 61,470,605,709.20
5. Step 5: Solve for x
   x = 61,470,605,709.20/279,978.22
6. Step 6: Final answer
   x = 219,554.96