Finding the Fourth Proportional to 1,173.65, 1,619.78 and 676.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173.65 : 1,619.78 = 676.31 : x
2. Step 2: Convert to fraction form
   1,173.65/1,619.78 = 676.31/x
3. Step 3: Cross multiply
   1,173.65x = 1,619.78 × 676.31
4. Step 4: Simplify right side
   1,173.65x = 1,095,470.03
5. Step 5: Solve for x
   x = 1,095,470.03/1,173.65
6. Step 6: Final answer
   x = 933.39