Finding the Fourth Proportional to 1,525.61, 2,105.39 and 862.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.61 : 2,105.39 = 862.43 : x
2. Step 2: Convert to fraction form
   1,525.61/2,105.39 = 862.43/x
3. Step 3: Cross multiply
   1,525.61x = 2,105.39 × 862.43
4. Step 4: Simplify right side
   1,525.61x = 1,815,743.13
5. Step 5: Solve for x
   x = 1,815,743.13/1,525.61
6. Step 6: Final answer
   x = 1,190.17