Finding the Fourth Proportional to 1,571.82, 2,169.03 and 890.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,571.82 : 2,169.03 = 890.49 : x
2. Step 2: Convert to fraction form
   1,571.82/2,169.03 = 890.49/x
3. Step 3: Cross multiply
   1,571.82x = 2,169.03 × 890.49
4. Step 4: Simplify right side
   1,571.82x = 1,931,499.52
5. Step 5: Solve for x
   x = 1,931,499.52/1,571.82
6. Step 6: Final answer
   x = 1,228.83