Finding the Fourth Proportional to 1,288.82, 1,933.49 and 519.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288.82 : 1,933.49 = 519.32 : x
2. Step 2: Convert to fraction form
   1,288.82/1,933.49 = 519.32/x
3. Step 3: Cross multiply
   1,288.82x = 1,933.49 × 519.32
4. Step 4: Simplify right side
   1,288.82x = 1,004,100.03
5. Step 5: Solve for x
   x = 1,004,100.03/1,288.82
6. Step 6: Final answer
   x = 779.08