Finding the Fourth Proportional to 2,257.02, 3,114.71 and 1,312.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,257.02 : 3,114.71 = 1,312.86 : x
2. Step 2: Convert to fraction form
   2,257.02/3,114.71 = 1,312.86/x
3. Step 3: Cross multiply
   2,257.02x = 3,114.71 × 1,312.86
4. Step 4: Simplify right side
   2,257.02x = 4,089,171.61
5. Step 5: Solve for x
   x = 4,089,171.61/2,257.02
6. Step 6: Final answer
   x = 1,811.76