Finding the Fourth Proportional to 1,315.82, 1,815.73 and 756.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.82 : 1,815.73 = 756.20 : x
2. Step 2: Convert to fraction form
   1,315.82/1,815.73 = 756.20/x
3. Step 3: Cross multiply
   1,315.82x = 1,815.73 × 756.20
4. Step 4: Simplify right side
   1,315.82x = 1,373,057.67
5. Step 5: Solve for x
   x = 1,373,057.67/1,315.82
6. Step 6: Final answer
   x = 1,043.50