Finding the Fourth Proportional to 1,288.72, 1,930.49 and 594.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288.72 : 1,930.49 = 594.42 : x
2. Step 2: Convert to fraction form
   1,288.72/1,930.49 = 594.42/x
3. Step 3: Cross multiply
   1,288.72x = 1,930.49 × 594.42
4. Step 4: Simplify right side
   1,288.72x = 1,147,521.87
5. Step 5: Solve for x
   x = 1,147,521.87/1,288.72
6. Step 6: Final answer
   x = 890.44