Finding the Fourth Proportional to 1,179.59, 1,768.55 and 486.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.59 : 1,768.55 = 486.05 : x
2. Step 2: Convert to fraction form
   1,179.59/1,768.55 = 486.05/x
3. Step 3: Cross multiply
   1,179.59x = 1,768.55 × 486.05
4. Step 4: Simplify right side
   1,179.59x = 859,592.45
5. Step 5: Solve for x
   x = 859,592.45/1,179.59
6. Step 6: Final answer
   x = 728.72