Finding the Fourth Proportional to 1,903.57, 2,855.69 and 671.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,903.57 : 2,855.69 = 671.69 : x
2. Step 2: Convert to fraction form
   1,903.57/2,855.69 = 671.69/x
3. Step 3: Cross multiply
   1,903.57x = 2,855.69 × 671.69
4. Step 4: Simplify right side
   1,903.57x = 1,918,144.72
5. Step 5: Solve for x
   x = 1,918,144.72/1,903.57
6. Step 6: Final answer
   x = 1,007.66