Finding the Fourth Proportional to 2,167.50, 2,991.69 and 1,236.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,167.50 : 2,991.69 = 1,236.54 : x
2. Step 2: Convert to fraction form
   2,167.50/2,991.69 = 1,236.54/x
3. Step 3: Cross multiply
   2,167.50x = 2,991.69 × 1,236.54
4. Step 4: Simplify right side
   2,167.50x = 3,699,344.35
5. Step 5: Solve for x
   x = 3,699,344.35/2,167.50
6. Step 6: Final answer
   x = 1,706.73