Finding the Fourth Proportional to 1,317.35, 1,817.95 and 727.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317.35 : 1,817.95 = 727.91 : x
2. Step 2: Convert to fraction form
   1,317.35/1,817.95 = 727.91/x
3. Step 3: Cross multiply
   1,317.35x = 1,817.95 × 727.91
4. Step 4: Simplify right side
   1,317.35x = 1,323,294.89
5. Step 5: Solve for x
   x = 1,323,294.89/1,317.35
6. Step 6: Final answer
   x = 1,004.52