Finding the Fourth Proportional to 2,381.52, 3,571.74 and 920.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,381.52 : 3,571.74 = 920.28 : x
2. Step 2: Convert to fraction form
   2,381.52/3,571.74 = 920.28/x
3. Step 3: Cross multiply
   2,381.52x = 3,571.74 × 920.28
4. Step 4: Simplify right side
   2,381.52x = 3,287,000.89
5. Step 5: Solve for x
   x = 3,287,000.89/2,381.52
6. Step 6: Final answer
   x = 1,380.21