Finding the Fourth Proportional to 1,525.39, 2,105.06 and 862.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.39 : 2,105.06 = 862.23 : x
2. Step 2: Convert to fraction form
   1,525.39/2,105.06 = 862.23/x
3. Step 3: Cross multiply
   1,525.39x = 2,105.06 × 862.23
4. Step 4: Simplify right side
   1,525.39x = 1,815,053.78
5. Step 5: Solve for x
   x = 1,815,053.78/1,525.39
6. Step 6: Final answer
   x = 1,189.89