Finding the Fourth Proportional to 1,900.86, 2,851.71 and 668.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,900.86 : 2,851.71 = 668.35 : x
2. Step 2: Convert to fraction form
   1,900.86/2,851.71 = 668.35/x
3. Step 3: Cross multiply
   1,900.86x = 2,851.71 × 668.35
4. Step 4: Simplify right side
   1,900.86x = 1,905,940.38
5. Step 5: Solve for x
   x = 1,905,940.38/1,900.86
6. Step 6: Final answer
   x = 1,002.68