Finding the Fourth Proportional to 1,179.50, 1,768.59 and 485.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.50 : 1,768.59 = 485.96 : x
2. Step 2: Convert to fraction form
   1,179.50/1,768.59 = 485.96/x
3. Step 3: Cross multiply
   1,179.50x = 1,768.59 × 485.96
4. Step 4: Simplify right side
   1,179.50x = 859,455.15
5. Step 5: Solve for x
   x = 859,455.15/1,179.50
6. Step 6: Final answer
   x = 728.66