Finding the Fourth Proportional to 9,984.80, 14,978.78 and 3,321.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,984.80 : 14,978.78 = 3,321.54 : x
2. Step 2: Convert to fraction form
   9,984.80/14,978.78 = 3,321.54/x
3. Step 3: Cross multiply
   9,984.80x = 14,978.78 × 3,321.54
4. Step 4: Simplify right side
   9,984.80x = 49,752,600.31
5. Step 5: Solve for x
   x = 49,752,600.31/9,984.80
6. Step 6: Final answer
   x = 4,982.84