Finding the Fourth Proportional to 2,167.50, 2,991.15 and 1,236

Step by Step Solution

1. Step 1: Write the proportion equation
   2,167.50 : 2,991.15 = 1,236 : x
2. Step 2: Convert to fraction form
   2,167.50/2,991.15 = 1,236/x
3. Step 3: Cross multiply
   2,167.50x = 2,991.15 × 1,236
4. Step 4: Simplify right side
   2,167.50x = 3,697,061.40
5. Step 5: Solve for x
   x = 3,697,061.40/2,167.50
6. Step 6: Final answer
   x = 1,705.68