Finding the Fourth Proportional to 1,315.72, 1,974.27 and 536.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.72 : 1,974.27 = 536.30 : x
2. Step 2: Convert to fraction form
   1,315.72/1,974.27 = 536.30/x
3. Step 3: Cross multiply
   1,315.72x = 1,974.27 × 536.30
4. Step 4: Simplify right side
   1,315.72x = 1,058,800.54
5. Step 5: Solve for x
   x = 1,058,800.54/1,315.72
6. Step 6: Final answer
   x = 804.73