Finding the Fourth Proportional to 1,105.42, 1,524.51 and 712.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.42 : 1,524.51 = 712.30 : x
2. Step 2: Convert to fraction form
   1,105.42/1,524.51 = 712.30/x
3. Step 3: Cross multiply
   1,105.42x = 1,524.51 × 712.30
4. Step 4: Simplify right side
   1,105.42x = 1,085,908.47
5. Step 5: Solve for x
   x = 1,085,908.47/1,105.42
6. Step 6: Final answer
   x = 982.35