Finding the Fourth Proportional to 1,123.16, 1,682.37 and 712.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.16 : 1,682.37 = 712.08 : x
2. Step 2: Convert to fraction form
   1,123.16/1,682.37 = 712.08/x
3. Step 3: Cross multiply
   1,123.16x = 1,682.37 × 712.08
4. Step 4: Simplify right side
   1,123.16x = 1,197,982.03
5. Step 5: Solve for x
   x = 1,197,982.03/1,123.16
6. Step 6: Final answer
   x = 1,066.62