Finding the Fourth Proportional to 2,677.37, 4,012.61 and 1,287.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,677.37 : 4,012.61 = 1,287.81 : x
2. Step 2: Convert to fraction form
   2,677.37/4,012.61 = 1,287.81/x
3. Step 3: Cross multiply
   2,677.37x = 4,012.61 × 1,287.81
4. Step 4: Simplify right side
   2,677.37x = 5,167,472.85
5. Step 5: Solve for x
   x = 5,167,472.85/2,677.37
6. Step 6: Final answer
   x = 1,930.06