Finding the Fourth Proportional to 1,983.15, 2,970.81 and 1,057.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,983.15 : 2,970.81 = 1,057.46 : x
2. Step 2: Convert to fraction form
   1,983.15/2,970.81 = 1,057.46/x
3. Step 3: Cross multiply
   1,983.15x = 2,970.81 × 1,057.46
4. Step 4: Simplify right side
   1,983.15x = 3,141,497.89
5. Step 5: Solve for x
   x = 3,141,497.89/1,983.15
6. Step 6: Final answer
   x = 1,584.09