Finding the Fourth Proportional to 2,069.50, 2,855.91 and 1,370.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.50 : 2,855.91 = 1,370.88 : x
2. Step 2: Convert to fraction form
   2,069.50/2,855.91 = 1,370.88/x
3. Step 3: Cross multiply
   2,069.50x = 2,855.91 × 1,370.88
4. Step 4: Simplify right side
   2,069.50x = 3,915,109.90
5. Step 5: Solve for x
   x = 3,915,109.90/2,069.50
6. Step 6: Final answer
   x = 1,891.81