Finding the Fourth Proportional to 1,899.99, 2,850.89 and 1,315.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.99 : 2,850.89 = 1,315.89 : x
2. Step 2: Convert to fraction form
   1,899.99/2,850.89 = 1,315.89/x
3. Step 3: Cross multiply
   1,899.99x = 2,850.89 × 1,315.89
4. Step 4: Simplify right side
   1,899.99x = 3,751,451.06
5. Step 5: Solve for x
   x = 3,751,451.06/1,899.99
6. Step 6: Final answer
   x = 1,974.46