Finding the Fourth Proportional to 1,420.03, 1,960.02 and 860.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,420.03 : 1,960.02 = 860.52 : x
2. Step 2: Convert to fraction form
   1,420.03/1,960.02 = 860.52/x
3. Step 3: Cross multiply
   1,420.03x = 1,960.02 × 860.52
4. Step 4: Simplify right side
   1,420.03x = 1,686,646.18
5. Step 5: Solve for x
   x = 1,686,646.18/1,420.03
6. Step 6: Final answer
   x = 1,187.75