Finding the Fourth Proportional to 2,086.81, 2,876.48 and 1,644.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.81 : 2,876.48 = 1,644.01 : x
2. Step 2: Convert to fraction form
   2,086.81/2,876.48 = 1,644.01/x
3. Step 3: Cross multiply
   2,086.81x = 2,876.48 × 1,644.01
4. Step 4: Simplify right side
   2,086.81x = 4,728,961.88
5. Step 5: Solve for x
   x = 4,728,961.88/2,086.81
6. Step 6: Final answer
   x = 2,266.12