Finding the Fourth Proportional to 1,288.04, 1,930.98 and 519.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288.04 : 1,930.98 = 519.08 : x
2. Step 2: Convert to fraction form
   1,288.04/1,930.98 = 519.08/x
3. Step 3: Cross multiply
   1,288.04x = 1,930.98 × 519.08
4. Step 4: Simplify right side
   1,288.04x = 1,002,333.10
5. Step 5: Solve for x
   x = 1,002,333.10/1,288.04
6. Step 6: Final answer
   x = 778.18