Finding the Fourth Proportional to 2,167.96, 2,991.79 and 1,173.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,167.96 : 2,991.79 = 1,173.25 : x
2. Step 2: Convert to fraction form
   2,167.96/2,991.79 = 1,173.25/x
3. Step 3: Cross multiply
   2,167.96x = 2,991.79 × 1,173.25
4. Step 4: Simplify right side
   2,167.96x = 3,510,117.62
5. Step 5: Solve for x
   x = 3,510,117.62/2,167.96
6. Step 6: Final answer
   x = 1,619.09