Finding the Fourth Proportional to 1,903.36, 2,854.86 and 670.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,903.36 : 2,854.86 = 670.71 : x
2. Step 2: Convert to fraction form
   1,903.36/2,854.86 = 670.71/x
3. Step 3: Cross multiply
   1,903.36x = 2,854.86 × 670.71
4. Step 4: Simplify right side
   1,903.36x = 1,914,783.15
5. Step 5: Solve for x
   x = 1,914,783.15/1,903.36
6. Step 6: Final answer
   x = 1,006.00