Finding the Fourth Proportional to 1,105.56, 1,525.16 and 712.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.56 : 1,525.16 = 712.71 : x
2. Step 2: Convert to fraction form
   1,105.56/1,525.16 = 712.71/x
3. Step 3: Cross multiply
   1,105.56x = 1,525.16 × 712.71
4. Step 4: Simplify right side
   1,105.56x = 1,086,998.57
5. Step 5: Solve for x
   x = 1,086,998.57/1,105.56
6. Step 6: Final answer
   x = 983.21