Finding the Fourth Proportional to 1,428.42, 2,141.58 and 965.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.42 : 2,141.58 = 965.05 : x
2. Step 2: Convert to fraction form
   1,428.42/2,141.58 = 965.05/x
3. Step 3: Cross multiply
   1,428.42x = 2,141.58 × 965.05
4. Step 4: Simplify right side
   1,428.42x = 2,066,721.07
5. Step 5: Solve for x
   x = 2,066,721.07/1,428.42
6. Step 6: Final answer
   x = 1,446.86