Finding the Fourth Proportional to 1,370.89, 2,057.39 and 1,020.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,370.89 : 2,057.39 = 1,020.29 : x
2. Step 2: Convert to fraction form
   1,370.89/2,057.39 = 1,020.29/x
3. Step 3: Cross multiply
   1,370.89x = 2,057.39 × 1,020.29
4. Step 4: Simplify right side
   1,370.89x = 2,099,124.32
5. Step 5: Solve for x
   x = 2,099,124.32/1,370.89
6. Step 6: Final answer
   x = 1,531.21