Finding the Fourth Proportional to 2,256.22, 3,113.61 and 1,312.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,256.22 : 3,113.61 = 1,312.09 : x
2. Step 2: Convert to fraction form
   2,256.22/3,113.61 = 1,312.09/x
3. Step 3: Cross multiply
   2,256.22x = 3,113.61 × 1,312.09
4. Step 4: Simplify right side
   2,256.22x = 4,085,336.54
5. Step 5: Solve for x
   x = 4,085,336.54/2,256.22
6. Step 6: Final answer
   x = 1,810.70