Finding the Fourth Proportional to 1,235.03, 1,704.71 and 861.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,235.03 : 1,704.71 = 861.86 : x
2. Step 2: Convert to fraction form
   1,235.03/1,704.71 = 861.86/x
3. Step 3: Cross multiply
   1,235.03x = 1,704.71 × 861.86
4. Step 4: Simplify right side
   1,235.03x = 1,469,227.78
5. Step 5: Solve for x
   x = 1,469,227.78/1,235.03
6. Step 6: Final answer
   x = 1,189.63