Finding the Fourth Proportional to 1,289.72, 1,931.98 and 595.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,289.72 : 1,931.98 = 595.42 : x
2. Step 2: Convert to fraction form
   1,289.72/1,931.98 = 595.42/x
3. Step 3: Cross multiply
   1,289.72x = 1,931.98 × 595.42
4. Step 4: Simplify right side
   1,289.72x = 1,150,339.53
5. Step 5: Solve for x
   x = 1,150,339.53/1,289.72
6. Step 6: Final answer
   x = 891.93