Finding the Fourth Proportional to 1,084.55, 1,496.91 and 685.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.55 : 1,496.91 = 685.96 : x
2. Step 2: Convert to fraction form
   1,084.55/1,496.91 = 685.96/x
3. Step 3: Cross multiply
   1,084.55x = 1,496.91 × 685.96
4. Step 4: Simplify right side
   1,084.55x = 1,026,820.38
5. Step 5: Solve for x
   x = 1,026,820.38/1,084.55
6. Step 6: Final answer
   x = 946.77