Finding the Fourth Proportional to 2,381.94, 3,571.92 and 920.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,381.94 : 3,571.92 = 920.25 : x
2. Step 2: Convert to fraction form
   2,381.94/3,571.92 = 920.25/x
3. Step 3: Cross multiply
   2,381.94x = 3,571.92 × 920.25
4. Step 4: Simplify right side
   2,381.94x = 3,287,059.38
5. Step 5: Solve for x
   x = 3,287,059.38/2,381.94
6. Step 6: Final answer
   x = 1,379.99