Finding the Fourth Proportional to 2,086.72, 2,880.18 and 1,423.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.72 : 2,880.18 = 1,423.84 : x
2. Step 2: Convert to fraction form
   2,086.72/2,880.18 = 1,423.84/x
3. Step 3: Cross multiply
   2,086.72x = 2,880.18 × 1,423.84
4. Step 4: Simplify right side
   2,086.72x = 4,100,915.49
5. Step 5: Solve for x
   x = 4,100,915.49/2,086.72
6. Step 6: Final answer
   x = 1,965.24