Finding the Fourth Proportional to 1,064.85, 1,594.49 and 890.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.85 : 1,594.49 = 890.56 : x
2. Step 2: Convert to fraction form
   1,064.85/1,594.49 = 890.56/x
3. Step 3: Cross multiply
   1,064.85x = 1,594.49 × 890.56
4. Step 4: Simplify right side
   1,064.85x = 1,419,986.55
5. Step 5: Solve for x
   x = 1,419,986.55/1,064.85
6. Step 6: Final answer
   x = 1,333.51