Finding the Fourth Proportional to 1,317.94, 1,818.89 and 728.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317.94 : 1,818.89 = 728.52 : x
2. Step 2: Convert to fraction form
   1,317.94/1,818.89 = 728.52/x
3. Step 3: Cross multiply
   1,317.94x = 1,818.89 × 728.52
4. Step 4: Simplify right side
   1,317.94x = 1,325,097.74
5. Step 5: Solve for x
   x = 1,325,097.74/1,317.94
6. Step 6: Final answer
   x = 1,005.43