Finding the Fourth Proportional to 1,085.10, 1,626.72 and 435.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.10 : 1,626.72 = 435.42 : x
2. Step 2: Convert to fraction form
   1,085.10/1,626.72 = 435.42/x
3. Step 3: Cross multiply
   1,085.10x = 1,626.72 × 435.42
4. Step 4: Simplify right side
   1,085.10x = 708,306.42
5. Step 5: Solve for x
   x = 708,306.42/1,085.10
6. Step 6: Final answer
   x = 652.76