Finding the Fourth Proportional to 1,940.31, 2,912.15 and 1,003.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,940.31 : 2,912.15 = 1,003.89 : x
2. Step 2: Convert to fraction form
   1,940.31/2,912.15 = 1,003.89/x
3. Step 3: Cross multiply
   1,940.31x = 2,912.15 × 1,003.89
4. Step 4: Simplify right side
   1,940.31x = 2,923,491.69
5. Step 5: Solve for x
   x = 2,923,491.69/1,940.31
6. Step 6: Final answer
   x = 1,506.71