Finding the Fourth Proportional to 111,951.30, 168,056.55 and 67,628.10

Step by Step Solution

1. Step 1: Write the proportion equation
   111,951.30 : 168,056.55 = 67,628.10 : x
2. Step 2: Convert to fraction form
   111,951.30/168,056.55 = 67,628.10/x
3. Step 3: Cross multiply
   111,951.30x = 168,056.55 × 67,628.10
4. Step 4: Simplify right side
   111,951.30x = 11,365,345,169.06
5. Step 5: Solve for x
   x = 11,365,345,169.06/111,951.30
6. Step 6: Final answer
   x = 101,520.44