Finding the Fourth Proportional to 1,419.17, 1,957.89 and 859.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.17 : 1,957.89 = 859.43 : x
2. Step 2: Convert to fraction form
   1,419.17/1,957.89 = 859.43/x
3. Step 3: Cross multiply
   1,419.17x = 1,957.89 × 859.43
4. Step 4: Simplify right side
   1,419.17x = 1,682,659.61
5. Step 5: Solve for x
   x = 1,682,659.61/1,419.17
6. Step 6: Final answer
   x = 1,185.67