Finding the Fourth Proportional to 1,171.35, 1,616.45 and 673.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.35 : 1,616.45 = 673.99 : x
2. Step 2: Convert to fraction form
   1,171.35/1,616.45 = 673.99/x
3. Step 3: Cross multiply
   1,171.35x = 1,616.45 × 673.99
4. Step 4: Simplify right side
   1,171.35x = 1,089,463.72
5. Step 5: Solve for x
   x = 1,089,463.72/1,171.35
6. Step 6: Final answer
   x = 930.09