Finding the Fourth Proportional to 1,900.38, 2,851.85 and 667.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,900.38 : 2,851.85 = 667.80 : x
2. Step 2: Convert to fraction form
   1,900.38/2,851.85 = 667.80/x
3. Step 3: Cross multiply
   1,900.38x = 2,851.85 × 667.80
4. Step 4: Simplify right side
   1,900.38x = 1,904,467.10
5. Step 5: Solve for x
   x = 1,904,467.10/1,900.38
6. Step 6: Final answer
   x = 1,002.15