Finding the Fourth Proportional to 2,186.79, 3,280.17 and 1,016.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.79 : 3,280.17 = 1,016.64 : x
2. Step 2: Convert to fraction form
   2,186.79/3,280.17 = 1,016.64/x
3. Step 3: Cross multiply
   2,186.79x = 3,280.17 × 1,016.64
4. Step 4: Simplify right side
   2,186.79x = 3,334,752.03
5. Step 5: Solve for x
   x = 3,334,752.03/2,186.79
6. Step 6: Final answer
   x = 1,524.95