Finding the Fourth Proportional to 1,105.49, 1,525.28 and 712.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.49 : 1,525.28 = 712.75 : x
2. Step 2: Convert to fraction form
   1,105.49/1,525.28 = 712.75/x
3. Step 3: Cross multiply
   1,105.49x = 1,525.28 × 712.75
4. Step 4: Simplify right side
   1,105.49x = 1,087,143.32
5. Step 5: Solve for x
   x = 1,087,143.32/1,105.49
6. Step 6: Final answer
   x = 983.40