Finding the Fourth Proportional to 2,256.32, 3,113.30 and 1,312.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,256.32 : 3,113.30 = 1,312.22 : x
2. Step 2: Convert to fraction form
   2,256.32/3,113.30 = 1,312.22/x
3. Step 3: Cross multiply
   2,256.32x = 3,113.30 × 1,312.22
4. Step 4: Simplify right side
   2,256.32x = 4,085,334.53
5. Step 5: Solve for x
   x = 4,085,334.53/2,256.32
6. Step 6: Final answer
   x = 1,810.62