Finding the Fourth Proportional to 1,315.91, 1,974.56 and 536.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.91 : 1,974.56 = 536.49 : x
2. Step 2: Convert to fraction form
   1,315.91/1,974.56 = 536.49/x
3. Step 3: Cross multiply
   1,315.91x = 1,974.56 × 536.49
4. Step 4: Simplify right side
   1,315.91x = 1,059,329.01
5. Step 5: Solve for x
   x = 1,059,329.01/1,315.91
6. Step 6: Final answer
   x = 805.01