Finding the Fourth Proportional to 1,525.55, 2,105.33 and 862.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.55 : 2,105.33 = 862.61 : x
2. Step 2: Convert to fraction form
   1,525.55/2,105.33 = 862.61/x
3. Step 3: Cross multiply
   1,525.55x = 2,105.33 × 862.61
4. Step 4: Simplify right side
   1,525.55x = 1,816,063.87
5. Step 5: Solve for x
   x = 1,816,063.87/1,525.55
6. Step 6: Final answer
   x = 1,190.44