Finding the Fourth Proportional to 1,419.69, 1,959.33 and 860.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.69 : 1,959.33 = 860.06 : x
2. Step 2: Convert to fraction form
   1,419.69/1,959.33 = 860.06/x
3. Step 3: Cross multiply
   1,419.69x = 1,959.33 × 860.06
4. Step 4: Simplify right side
   1,419.69x = 1,685,131.56
5. Step 5: Solve for x
   x = 1,685,131.56/1,419.69
6. Step 6: Final answer
   x = 1,186.97