Finding the Fourth Proportional to 1,525.11, 2,104.71 and 861.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.11 : 2,104.71 = 861.96 : x
2. Step 2: Convert to fraction form
   1,525.11/2,104.71 = 861.96/x
3. Step 3: Cross multiply
   1,525.11x = 2,104.71 × 861.96
4. Step 4: Simplify right side
   1,525.11x = 1,814,175.83
5. Step 5: Solve for x
   x = 1,814,175.83/1,525.11
6. Step 6: Final answer
   x = 1,189.54