Finding the Fourth Proportional to 1,870.74, 2,786.91 and 1,786.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.74 : 2,786.91 = 1,786.50 : x
2. Step 2: Convert to fraction form
   1,870.74/2,786.91 = 1,786.50/x
3. Step 3: Cross multiply
   1,870.74x = 2,786.91 × 1,786.50
4. Step 4: Simplify right side
   1,870.74x = 4,978,814.72
5. Step 5: Solve for x
   x = 4,978,814.72/1,870.74
6. Step 6: Final answer
   x = 2,661.41