Finding the Fourth Proportional to 2,382.57, 3,572.60 and 920.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,382.57 : 3,572.60 = 920.25 : x
2. Step 2: Convert to fraction form
   2,382.57/3,572.60 = 920.25/x
3. Step 3: Cross multiply
   2,382.57x = 3,572.60 × 920.25
4. Step 4: Simplify right side
   2,382.57x = 3,287,680.55
5. Step 5: Solve for x
   x = 3,287,680.55/2,382.57
6. Step 6: Final answer
   x = 1,379.89