Finding the Fourth Proportional to 1,171.08, 1,616.34 and 673.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.08 : 1,616.34 = 673.80 : x
2. Step 2: Convert to fraction form
   1,171.08/1,616.34 = 673.80/x
3. Step 3: Cross multiply
   1,171.08x = 1,616.34 × 673.80
4. Step 4: Simplify right side
   1,171.08x = 1,089,089.89
5. Step 5: Solve for x
   x = 1,089,089.89/1,171.08
6. Step 6: Final answer
   x = 929.99