Finding the Fourth Proportional to 1,173.89, 1,619.75 and 676.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173.89 : 1,619.75 = 676.55 : x
2. Step 2: Convert to fraction form
   1,173.89/1,619.75 = 676.55/x
3. Step 3: Cross multiply
   1,173.89x = 1,619.75 × 676.55
4. Step 4: Simplify right side
   1,173.89x = 1,095,830.38
5. Step 5: Solve for x
   x = 1,095,830.38/1,173.89
6. Step 6: Final answer
   x = 933.51