Finding the Fourth Proportional to 1,899.89, 2,851.12 and 667.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.89 : 2,851.12 = 667.31 : x
2. Step 2: Convert to fraction form
   1,899.89/2,851.12 = 667.31/x
3. Step 3: Cross multiply
   1,899.89x = 2,851.12 × 667.31
4. Step 4: Simplify right side
   1,899.89x = 1,902,564.96
5. Step 5: Solve for x
   x = 1,902,564.96/1,899.89
6. Step 6: Final answer
   x = 1,001.41