Finding the Fourth Proportional to 2,255.69, 3,113.40 and 1,372.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.69 : 3,113.40 = 1,372.10 : x
2. Step 2: Convert to fraction form
   2,255.69/3,113.40 = 1,372.10/x
3. Step 3: Cross multiply
   2,255.69x = 3,113.40 × 1,372.10
4. Step 4: Simplify right side
   2,255.69x = 4,271,880.57
5. Step 5: Solve for x
   x = 4,271,880.57/2,255.69
6. Step 6: Final answer
   x = 1,893.83