Finding the Fourth Proportional to 1,525.76, 2,105.40 and 862.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.76 : 2,105.40 = 862.61 : x
2. Step 2: Convert to fraction form
   1,525.76/2,105.40 = 862.61/x
3. Step 3: Cross multiply
   1,525.76x = 2,105.40 × 862.61
4. Step 4: Simplify right side
   1,525.76x = 1,816,128.57
5. Step 5: Solve for x
   x = 1,816,128.57/1,525.76
6. Step 6: Final answer
   x = 1,190.31