Finding the Fourth Proportional to 1,525.47, 2,103.90 and 935.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.47 : 2,103.90 = 935.61 : x
2. Step 2: Convert to fraction form
   1,525.47/2,103.90 = 935.61/x
3. Step 3: Cross multiply
   1,525.47x = 2,103.90 × 935.61
4. Step 4: Simplify right side
   1,525.47x = 1,968,429.88
5. Step 5: Solve for x
   x = 1,968,429.88/1,525.47
6. Step 6: Final answer
   x = 1,290.38