Finding the Fourth Proportional to 1,131.30, 1,697.04 and 515.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.30 : 1,697.04 = 515.03 : x
2. Step 2: Convert to fraction form
   1,131.30/1,697.04 = 515.03/x
3. Step 3: Cross multiply
   1,131.30x = 1,697.04 × 515.03
4. Step 4: Simplify right side
   1,131.30x = 874,018.03
5. Step 5: Solve for x
   x = 874,018.03/1,131.30
6. Step 6: Final answer
   x = 772.58