Finding the Fourth Proportional to 1,055.73, 1,584.42 and 690.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.73 : 1,584.42 = 690.42 : x
2. Step 2: Convert to fraction form
   1,055.73/1,584.42 = 690.42/x
3. Step 3: Cross multiply
   1,055.73x = 1,584.42 × 690.42
4. Step 4: Simplify right side
   1,055.73x = 1,093,915.26
5. Step 5: Solve for x
   x = 1,093,915.26/1,055.73
6. Step 6: Final answer
   x = 1,036.17