Finding the Fourth Proportional to 2,257.09, 3,114.56 and 1,312.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,257.09 : 3,114.56 = 1,312.83 : x
2. Step 2: Convert to fraction form
   2,257.09/3,114.56 = 1,312.83/x
3. Step 3: Cross multiply
   2,257.09x = 3,114.56 × 1,312.83
4. Step 4: Simplify right side
   2,257.09x = 4,088,883.30
5. Step 5: Solve for x
   x = 4,088,883.30/2,257.09
6. Step 6: Final answer
   x = 1,811.58