Finding the Fourth Proportional to 285,978.89, 394,486.89 and 178,362.09

Step by Step Solution

1. Step 1: Write the proportion equation
   285,978.89 : 394,486.89 = 178,362.09 : x
2. Step 2: Convert to fraction form
   285,978.89/394,486.89 = 178,362.09/x
3. Step 3: Cross multiply
   285,978.89x = 394,486.89 × 178,362.09
4. Step 4: Simplify right side
   285,978.89x = 70,361,506,178.00
5. Step 5: Solve for x
   x = 70,361,506,178.00/285,978.89
6. Step 6: Final answer
   x = 246,037.42