Finding the Fourth Proportional to 3,318.54, 4,978.35 and 1,009.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,318.54 : 4,978.35 = 1,009.50 : x
2. Step 2: Convert to fraction form
   3,318.54/4,978.35 = 1,009.50/x
3. Step 3: Cross multiply
   3,318.54x = 4,978.35 × 1,009.50
4. Step 4: Simplify right side
   3,318.54x = 5,025,644.33
5. Step 5: Solve for x
   x = 5,025,644.33/3,318.54
6. Step 6: Final answer
   x = 1,514.41