Finding the Fourth Proportional to 2,639.86, 3,643.12 and 1,461.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.86 : 3,643.12 = 1,461.02 : x
2. Step 2: Convert to fraction form
   2,639.86/3,643.12 = 1,461.02/x
3. Step 3: Cross multiply
   2,639.86x = 3,643.12 × 1,461.02
4. Step 4: Simplify right side
   2,639.86x = 5,322,671.18
5. Step 5: Solve for x
   x = 5,322,671.18/2,639.86
6. Step 6: Final answer
   x = 2,016.27