Finding the Fourth Proportional to 1,419.30, 1,958.13 and 859.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.30 : 1,958.13 = 859.95 : x
2. Step 2: Convert to fraction form
   1,419.30/1,958.13 = 859.95/x
3. Step 3: Cross multiply
   1,419.30x = 1,958.13 × 859.95
4. Step 4: Simplify right side
   1,419.30x = 1,683,893.89
5. Step 5: Solve for x
   x = 1,683,893.89/1,419.30
6. Step 6: Final answer
   x = 1,186.43