Finding the Fourth Proportional to 1,130.82, 1,559.61 and 815.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,130.82 : 1,559.61 = 815.46 : x
2. Step 2: Convert to fraction form
   1,130.82/1,559.61 = 815.46/x
3. Step 3: Cross multiply
   1,130.82x = 1,559.61 × 815.46
4. Step 4: Simplify right side
   1,130.82x = 1,271,799.57
5. Step 5: Solve for x
   x = 1,271,799.57/1,130.82
6. Step 6: Final answer
   x = 1,124.67