Finding the Fourth Proportional to 2,016.18, 2,783.55 and 1,318.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.18 : 2,783.55 = 1,318.77 : x
2. Step 2: Convert to fraction form
   2,016.18/2,783.55 = 1,318.77/x
3. Step 3: Cross multiply
   2,016.18x = 2,783.55 × 1,318.77
4. Step 4: Simplify right side
   2,016.18x = 3,670,862.23
5. Step 5: Solve for x
   x = 3,670,862.23/2,016.18
6. Step 6: Final answer
   x = 1,820.70