Finding the Fourth Proportional to 1,525.15, 2,104.65 and 862.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.15 : 2,104.65 = 862.09 : x
2. Step 2: Convert to fraction form
   1,525.15/2,104.65 = 862.09/x
3. Step 3: Cross multiply
   1,525.15x = 2,104.65 × 862.09
4. Step 4: Simplify right side
   1,525.15x = 1,814,397.72
5. Step 5: Solve for x
   x = 1,814,397.72/1,525.15
6. Step 6: Final answer
   x = 1,189.65