Finding the Fourth Proportional to 1,105.26, 1,525.28 and 712.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.26 : 1,525.28 = 712.42 : x
2. Step 2: Convert to fraction form
   1,105.26/1,525.28 = 712.42/x
3. Step 3: Cross multiply
   1,105.26x = 1,525.28 × 712.42
4. Step 4: Simplify right side
   1,105.26x = 1,086,639.98
5. Step 5: Solve for x
   x = 1,086,639.98/1,105.26
6. Step 6: Final answer
   x = 983.15