Finding the Fourth Proportional to 1,317.56, 1,818.15 and 727.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317.56 : 1,818.15 = 727.99 : x
2. Step 2: Convert to fraction form
   1,317.56/1,818.15 = 727.99/x
3. Step 3: Cross multiply
   1,317.56x = 1,818.15 × 727.99
4. Step 4: Simplify right side
   1,317.56x = 1,323,595.02
5. Step 5: Solve for x
   x = 1,323,595.02/1,317.56
6. Step 6: Final answer
   x = 1,004.58