Finding the Fourth Proportional to 3,318.18, 4,978.01 and 1,009.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,318.18 : 4,978.01 = 1,009.86 : x
2. Step 2: Convert to fraction form
   3,318.18/4,978.01 = 1,009.86/x
3. Step 3: Cross multiply
   3,318.18x = 4,978.01 × 1,009.86
4. Step 4: Simplify right side
   3,318.18x = 5,027,093.18
5. Step 5: Solve for x
   x = 5,027,093.18/3,318.18
6. Step 6: Final answer
   x = 1,515.02