Finding the Fourth Proportional to 1,103.50, 1,523.51 and 711.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.50 : 1,523.51 = 711.21 : x
2. Step 2: Convert to fraction form
   1,103.50/1,523.51 = 711.21/x
3. Step 3: Cross multiply
   1,103.50x = 1,523.51 × 711.21
4. Step 4: Simplify right side
   1,103.50x = 1,083,535.55
5. Step 5: Solve for x
   x = 1,083,535.55/1,103.50
6. Step 6: Final answer
   x = 981.91