Finding the Fourth Proportional to 1,960.65, 2,705.91 and 1,121.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,960.65 : 2,705.91 = 1,121.43 : x
2. Step 2: Convert to fraction form
   1,960.65/2,705.91 = 1,121.43/x
3. Step 3: Cross multiply
   1,960.65x = 2,705.91 × 1,121.43
4. Step 4: Simplify right side
   1,960.65x = 3,034,474.30
5. Step 5: Solve for x
   x = 3,034,474.30/1,960.65
6. Step 6: Final answer
   x = 1,547.69