Finding the Fourth Proportional to 3,012.89, 4,157.57 and 1,686.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,012.89 : 4,157.57 = 1,686.71 : x
2. Step 2: Convert to fraction form
   3,012.89/4,157.57 = 1,686.71/x
3. Step 3: Cross multiply
   3,012.89x = 4,157.57 × 1,686.71
4. Step 4: Simplify right side
   3,012.89x = 7,012,585.67
5. Step 5: Solve for x
   x = 7,012,585.67/3,012.89
6. Step 6: Final answer
   x = 2,327.53