Finding the Fourth Proportional to 1,870.73, 2,786.90 and 1,786.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.73 : 2,786.90 = 1,786.49 : x
2. Step 2: Convert to fraction form
   1,870.73/2,786.90 = 1,786.49/x
3. Step 3: Cross multiply
   1,870.73x = 2,786.90 × 1,786.49
4. Step 4: Simplify right side
   1,870.73x = 4,978,768.98
5. Step 5: Solve for x
   x = 4,978,768.98/1,870.73
6. Step 6: Final answer
   x = 2,661.40