Finding the Fourth Proportional to 1,085.94, 1,629.15 and 356.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.94 : 1,629.15 = 356.03 : x
2. Step 2: Convert to fraction form
   1,085.94/1,629.15 = 356.03/x
3. Step 3: Cross multiply
   1,085.94x = 1,629.15 × 356.03
4. Step 4: Simplify right side
   1,085.94x = 580,022.90
5. Step 5: Solve for x
   x = 580,022.90/1,085.94
6. Step 6: Final answer
   x = 534.12