Finding the Fourth Proportional to 2,311.22, 3,189.37 and 1,316.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.22 : 3,189.37 = 1,316.50 : x
2. Step 2: Convert to fraction form
   2,311.22/3,189.37 = 1,316.50/x
3. Step 3: Cross multiply
   2,311.22x = 3,189.37 × 1,316.50
4. Step 4: Simplify right side
   2,311.22x = 4,198,805.61
5. Step 5: Solve for x
   x = 4,198,805.61/2,311.22
6. Step 6: Final answer
   x = 1,816.71