Finding the Fourth Proportional to 1,904.86, 2,856.58 and 671.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,904.86 : 2,856.58 = 671.94 : x
2. Step 2: Convert to fraction form
   1,904.86/2,856.58 = 671.94/x
3. Step 3: Cross multiply
   1,904.86x = 2,856.58 × 671.94
4. Step 4: Simplify right side
   1,904.86x = 1,919,448.69
5. Step 5: Solve for x
   x = 1,919,448.69/1,904.86
6. Step 6: Final answer
   x = 1,007.66