Finding the Fourth Proportional to 2,099.71, 3,153.71 and 1,321.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.71 : 3,153.71 = 1,321.10 : x
2. Step 2: Convert to fraction form
   2,099.71/3,153.71 = 1,321.10/x
3. Step 3: Cross multiply
   2,099.71x = 3,153.71 × 1,321.10
4. Step 4: Simplify right side
   2,099.71x = 4,166,366.28
5. Step 5: Solve for x
   x = 4,166,366.28/2,099.71
6. Step 6: Final answer
   x = 1,984.26