Finding the Fourth Proportional to 2,868.48, 4,301.82 and 920.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,868.48 : 4,301.82 = 920.25 : x
2. Step 2: Convert to fraction form
   2,868.48/4,301.82 = 920.25/x
3. Step 3: Cross multiply
   2,868.48x = 4,301.82 × 920.25
4. Step 4: Simplify right side
   2,868.48x = 3,958,749.86
5. Step 5: Solve for x
   x = 3,958,749.86/2,868.48
6. Step 6: Final answer
   x = 1,380.09