Finding the Fourth Proportional to 2,962.78, 4,443.60 and 988.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,962.78 : 4,443.60 = 988.42 : x
2. Step 2: Convert to fraction form
   2,962.78/4,443.60 = 988.42/x
3. Step 3: Cross multiply
   2,962.78x = 4,443.60 × 988.42
4. Step 4: Simplify right side
   2,962.78x = 4,392,143.11
5. Step 5: Solve for x
   x = 4,392,143.11/2,962.78
6. Step 6: Final answer
   x = 1,482.44