Finding the Fourth Proportional to 2,580.21, 3,868.58 and 936.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580.21 : 3,868.58 = 936.54 : x
2. Step 2: Convert to fraction form
   2,580.21/3,868.58 = 936.54/x
3. Step 3: Cross multiply
   2,580.21x = 3,868.58 × 936.54
4. Step 4: Simplify right side
   2,580.21x = 3,623,082.25
5. Step 5: Solve for x
   x = 3,623,082.25/2,580.21
6. Step 6: Final answer
   x = 1,404.18