Finding the Fourth Proportional to 1,103.67, 1,522.74 and 711.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.67 : 1,522.74 = 711.21 : x
2. Step 2: Convert to fraction form
   1,103.67/1,522.74 = 711.21/x
3. Step 3: Cross multiply
   1,103.67x = 1,522.74 × 711.21
4. Step 4: Simplify right side
   1,103.67x = 1,082,987.92
5. Step 5: Solve for x
   x = 1,082,987.92/1,103.67
6. Step 6: Final answer
   x = 981.26