Finding the Fourth Proportional to 1,899.76, 2,850.72 and 667.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.76 : 2,850.72 = 667.45 : x
2. Step 2: Convert to fraction form
   1,899.76/2,850.72 = 667.45/x
3. Step 3: Cross multiply
   1,899.76x = 2,850.72 × 667.45
4. Step 4: Simplify right side
   1,899.76x = 1,902,713.06
5. Step 5: Solve for x
   x = 1,902,713.06/1,899.76
6. Step 6: Final answer
   x = 1,001.55