Finding the Fourth Proportional to 1,085.27, 1,628.06 and 435.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.27 : 1,628.06 = 435.96 : x
2. Step 2: Convert to fraction form
   1,085.27/1,628.06 = 435.96/x
3. Step 3: Cross multiply
   1,085.27x = 1,628.06 × 435.96
4. Step 4: Simplify right side
   1,085.27x = 709,766.86
5. Step 5: Solve for x
   x = 709,766.86/1,085.27
6. Step 6: Final answer
   x = 654.00