Finding the Fourth Proportional to 2,521.49, 3,778.71 and 959.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.49 : 3,778.71 = 959.81 : x
2. Step 2: Convert to fraction form
   2,521.49/3,778.71 = 959.81/x
3. Step 3: Cross multiply
   2,521.49x = 3,778.71 × 959.81
4. Step 4: Simplify right side
   2,521.49x = 3,626,824.75
5. Step 5: Solve for x
   x = 3,626,824.75/2,521.49
6. Step 6: Final answer
   x = 1,438.37