Finding the Fourth Proportional to 2,086.62, 2,872.22 and 1,889.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.62 : 2,872.22 = 1,889.79 : x
2. Step 2: Convert to fraction form
   2,086.62/2,872.22 = 1,889.79/x
3. Step 3: Cross multiply
   2,086.62x = 2,872.22 × 1,889.79
4. Step 4: Simplify right side
   2,086.62x = 5,427,892.63
5. Step 5: Solve for x
   x = 5,427,892.63/2,086.62
6. Step 6: Final answer
   x = 2,601.28