Finding the Fourth Proportional to 1,419.89, 2,128.41 and 956.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.89 : 2,128.41 = 956.57 : x
2. Step 2: Convert to fraction form
   1,419.89/2,128.41 = 956.57/x
3. Step 3: Cross multiply
   1,419.89x = 2,128.41 × 956.57
4. Step 4: Simplify right side
   1,419.89x = 2,035,962.51
5. Step 5: Solve for x
   x = 2,035,962.51/1,419.89
6. Step 6: Final answer
   x = 1,433.89