Finding the Fourth Proportional to 2,057.40, 3,085.43 and 670.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.40 : 3,085.43 = 670.37 : x
2. Step 2: Convert to fraction form
   2,057.40/3,085.43 = 670.37/x
3. Step 3: Cross multiply
   2,057.40x = 3,085.43 × 670.37
4. Step 4: Simplify right side
   2,057.40x = 2,068,360.93
5. Step 5: Solve for x
   x = 2,068,360.93/2,057.40
6. Step 6: Final answer
   x = 1,005.33