Finding the Fourth Proportional to 1,085.96, 1,631.61 and 696.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.96 : 1,631.61 = 696.12 : x
2. Step 2: Convert to fraction form
   1,085.96/1,631.61 = 696.12/x
3. Step 3: Cross multiply
   1,085.96x = 1,631.61 × 696.12
4. Step 4: Simplify right side
   1,085.96x = 1,135,792.87
5. Step 5: Solve for x
   x = 1,135,792.87/1,085.96
6. Step 6: Final answer
   x = 1,045.89