Finding the Fourth Proportional to 1,965.70, 2,945.58 and 1,315.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,965.70 : 2,945.58 = 1,315.27 : x
2. Step 2: Convert to fraction form
   1,965.70/2,945.58 = 1,315.27/x
3. Step 3: Cross multiply
   1,965.70x = 2,945.58 × 1,315.27
4. Step 4: Simplify right side
   1,965.70x = 3,874,233.01
5. Step 5: Solve for x
   x = 3,874,233.01/1,965.70
6. Step 6: Final answer
   x = 1,970.92