Finding the Fourth Proportional to 2,103.50, 2,899.50 and 1,683.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.50 : 2,899.50 = 1,683.20 : x
2. Step 2: Convert to fraction form
   2,103.50/2,899.50 = 1,683.20/x
3. Step 3: Cross multiply
   2,103.50x = 2,899.50 × 1,683.20
4. Step 4: Simplify right side
   2,103.50x = 4,880,438.40
5. Step 5: Solve for x
   x = 4,880,438.40/2,103.50
6. Step 6: Final answer
   x = 2,320.15