Finding the Fourth Proportional to 1,148.43, 1,584.78 and 676.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,148.43 : 1,584.78 = 676.31 : x
2. Step 2: Convert to fraction form
   1,148.43/1,584.78 = 676.31/x
3. Step 3: Cross multiply
   1,148.43x = 1,584.78 × 676.31
4. Step 4: Simplify right side
   1,148.43x = 1,071,794.64
5. Step 5: Solve for x
   x = 1,071,794.64/1,148.43
6. Step 6: Final answer
   x = 933.27