Finding the Fourth Proportional to 1,419.90, 1,959.50 and 860.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.90 : 1,959.50 = 860.26 : x
2. Step 2: Convert to fraction form
   1,419.90/1,959.50 = 860.26/x
3. Step 3: Cross multiply
   1,419.90x = 1,959.50 × 860.26
4. Step 4: Simplify right side
   1,419.90x = 1,685,679.47
5. Step 5: Solve for x
   x = 1,685,679.47/1,419.90
6. Step 6: Final answer
   x = 1,187.18