Finding the Fourth Proportional to 1,315.59, 1,974.53 and 767.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.59 : 1,974.53 = 767.03 : x
2. Step 2: Convert to fraction form
   1,315.59/1,974.53 = 767.03/x
3. Step 3: Cross multiply
   1,315.59x = 1,974.53 × 767.03
4. Step 4: Simplify right side
   1,315.59x = 1,514,510.04
5. Step 5: Solve for x
   x = 1,514,510.04/1,315.59
6. Step 6: Final answer
   x = 1,151.20