Finding the Fourth Proportional to 308,020.89, 425,067.74 and 178,978.17

Step by Step Solution

1. Step 1: Write the proportion equation
   308,020.89 : 425,067.74 = 178,978.17 : x
2. Step 2: Convert to fraction form
   308,020.89/425,067.74 = 178,978.17/x
3. Step 3: Cross multiply
   308,020.89x = 425,067.74 × 178,978.17
4. Step 4: Simplify right side
   308,020.89x = 76,077,845,336.35
5. Step 5: Solve for x
   x = 76,077,845,336.35/308,020.89
6. Step 6: Final answer
   x = 246,989.24