Finding the Fourth Proportional to 1,104.72, 1,525.02 and 712.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,104.72 : 1,525.02 = 712.40 : x
2. Step 2: Convert to fraction form
   1,104.72/1,525.02 = 712.40/x
3. Step 3: Cross multiply
   1,104.72x = 1,525.02 × 712.40
4. Step 4: Simplify right side
   1,104.72x = 1,086,424.25
5. Step 5: Solve for x
   x = 1,086,424.25/1,104.72
6. Step 6: Final answer
   x = 983.44