Finding the Fourth Proportional to 311,870.46, 430,380.99 and 168,630.42

Step by Step Solution

1. Step 1: Write the proportion equation
   311,870.46 : 430,380.99 = 168,630.42 : x
2. Step 2: Convert to fraction form
   311,870.46/430,380.99 = 168,630.42/x
3. Step 3: Cross multiply
   311,870.46x = 430,380.99 × 168,630.42
4. Step 4: Simplify right side
   311,870.46x = 72,575,327,103.72
5. Step 5: Solve for x
   x = 72,575,327,103.72/311,870.46
6. Step 6: Final answer
   x = 232,709.85