Finding the Fourth Proportional to 1,085.10, 1,496.25 and 691.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.10 : 1,496.25 = 691.62 : x
2. Step 2: Convert to fraction form
   1,085.10/1,496.25 = 691.62/x
3. Step 3: Cross multiply
   1,085.10x = 1,496.25 × 691.62
4. Step 4: Simplify right side
   1,085.10x = 1,034,836.43
5. Step 5: Solve for x
   x = 1,034,836.43/1,085.10
6. Step 6: Final answer
   x = 953.68