Finding the Fourth Proportional to 311,942.34, 430,485.30 and 175,978.89

Step by Step Solution

1. Step 1: Write the proportion equation
   311,942.34 : 430,485.30 = 175,978.89 : x
2. Step 2: Convert to fraction form
   311,942.34/430,485.30 = 175,978.89/x
3. Step 3: Cross multiply
   311,942.34x = 430,485.30 × 175,978.89
4. Step 4: Simplify right side
   311,942.34x = 75,756,325,255.32
5. Step 5: Solve for x
   x = 75,756,325,255.32/311,942.34
6. Step 6: Final answer
   x = 242,853.62