Finding the Fourth Proportional to 1,085.25, 1,627.82 and 305.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.25 : 1,627.82 = 305.31 : x
2. Step 2: Convert to fraction form
   1,085.25/1,627.82 = 305.31/x
3. Step 3: Cross multiply
   1,085.25x = 1,627.82 × 305.31
4. Step 4: Simplify right side
   1,085.25x = 496,989.72
5. Step 5: Solve for x
   x = 496,989.72/1,085.25
6. Step 6: Final answer
   x = 457.95