Finding the Fourth Proportional to 2,057.30, 3,085.49 and 670.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.30 : 3,085.49 = 670.38 : x
2. Step 2: Convert to fraction form
   2,057.30/3,085.49 = 670.38/x
3. Step 3: Cross multiply
   2,057.30x = 3,085.49 × 670.38
4. Step 4: Simplify right side
   2,057.30x = 2,068,440.89
5. Step 5: Solve for x
   x = 2,068,440.89/2,057.30
6. Step 6: Final answer
   x = 1,005.42