Finding the Fourth Proportional to 1,040.52, 1,556.18 and 925.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.52 : 1,556.18 = 925.78 : x
2. Step 2: Convert to fraction form
   1,040.52/1,556.18 = 925.78/x
3. Step 3: Cross multiply
   1,040.52x = 1,556.18 × 925.78
4. Step 4: Simplify right side
   1,040.52x = 1,440,680.32
5. Step 5: Solve for x
   x = 1,440,680.32/1,040.52
6. Step 6: Final answer
   x = 1,384.58