Finding the Fourth Proportional to 1,991.50, 2,748.27 and 1,163.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.50 : 2,748.27 = 1,163.50 : x
2. Step 2: Convert to fraction form
   1,991.50/2,748.27 = 1,163.50/x
3. Step 3: Cross multiply
   1,991.50x = 2,748.27 × 1,163.50
4. Step 4: Simplify right side
   1,991.50x = 3,197,612.15
5. Step 5: Solve for x
   x = 3,197,612.15/1,991.50
6. Step 6: Final answer
   x = 1,605.63