Finding the Fourth Proportional to 1,148.58, 1,585.81 and 882.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,148.58 : 1,585.81 = 882.55 : x
2. Step 2: Convert to fraction form
   1,148.58/1,585.81 = 882.55/x
3. Step 3: Cross multiply
   1,148.58x = 1,585.81 × 882.55
4. Step 4: Simplify right side
   1,148.58x = 1,399,556.39
5. Step 5: Solve for x
   x = 1,399,556.39/1,148.58
6. Step 6: Final answer
   x = 1,218.51