Finding the Fourth Proportional to 2,601.62, 3,902.68 and 957.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,601.62 : 3,902.68 = 957.78 : x
2. Step 2: Convert to fraction form
   2,601.62/3,902.68 = 957.78/x
3. Step 3: Cross multiply
   2,601.62x = 3,902.68 × 957.78
4. Step 4: Simplify right side
   2,601.62x = 3,737,915.82
5. Step 5: Solve for x
   x = 3,737,915.82/2,601.62
6. Step 6: Final answer
   x = 1,436.77