Finding the Fourth Proportional to 1,525.69, 2,105.49 and 862.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.69 : 2,105.49 = 862.57 : x
2. Step 2: Convert to fraction form
   1,525.69/2,105.49 = 862.57/x
3. Step 3: Cross multiply
   1,525.69x = 2,105.49 × 862.57
4. Step 4: Simplify right side
   1,525.69x = 1,816,132.51
5. Step 5: Solve for x
   x = 1,816,132.51/1,525.69
6. Step 6: Final answer
   x = 1,190.37