Finding the Fourth Proportional to 1,010.72, 1,504.58 and 1,005.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.72 : 1,504.58 = 1,005.23 : x
2. Step 2: Convert to fraction form
   1,010.72/1,504.58 = 1,005.23/x
3. Step 3: Cross multiply
   1,010.72x = 1,504.58 × 1,005.23
4. Step 4: Simplify right side
   1,010.72x = 1,512,448.95
5. Step 5: Solve for x
   x = 1,512,448.95/1,010.72
6. Step 6: Final answer
   x = 1,496.41