Finding the Fourth Proportional to 1,900.56, 2,850.06 and 667.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,900.56 : 2,850.06 = 667.72 : x
2. Step 2: Convert to fraction form
   1,900.56/2,850.06 = 667.72/x
3. Step 3: Cross multiply
   1,900.56x = 2,850.06 × 667.72
4. Step 4: Simplify right side
   1,900.56x = 1,903,042.06
5. Step 5: Solve for x
   x = 1,903,042.06/1,900.56
6. Step 6: Final answer
   x = 1,001.31