Finding the Fourth Proportional to 1,966.05, 2,945.61 and 1,039.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,966.05 : 2,945.61 = 1,039.56 : x
2. Step 2: Convert to fraction form
   1,966.05/2,945.61 = 1,039.56/x
3. Step 3: Cross multiply
   1,966.05x = 2,945.61 × 1,039.56
4. Step 4: Simplify right side
   1,966.05x = 3,062,138.33
5. Step 5: Solve for x
   x = 3,062,138.33/1,966.05
6. Step 6: Final answer
   x = 1,557.51