Finding the Fourth Proportional to 2,606.65, 3,907.60 and 962.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.65 : 3,907.60 = 962.78 : x
2. Step 2: Convert to fraction form
   2,606.65/3,907.60 = 962.78/x
3. Step 3: Cross multiply
   2,606.65x = 3,907.60 × 962.78
4. Step 4: Simplify right side
   2,606.65x = 3,762,137.18
5. Step 5: Solve for x
   x = 3,762,137.18/2,606.65
6. Step 6: Final answer
   x = 1,443.29