Finding the Fourth Proportional to 1,419.89, 1,958.77 and 1,223.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.89 : 1,958.77 = 1,223.06 : x
2. Step 2: Convert to fraction form
   1,419.89/1,958.77 = 1,223.06/x
3. Step 3: Cross multiply
   1,419.89x = 1,958.77 × 1,223.06
4. Step 4: Simplify right side
   1,419.89x = 2,395,693.24
5. Step 5: Solve for x
   x = 2,395,693.24/1,419.89
6. Step 6: Final answer
   x = 1,687.24