Finding the Fourth Proportional to 2,147.77, 3,236.28 and 1,766.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.77 : 3,236.28 = 1,766.31 : x
2. Step 2: Convert to fraction form
   2,147.77/3,236.28 = 1,766.31/x
3. Step 3: Cross multiply
   2,147.77x = 3,236.28 × 1,766.31
4. Step 4: Simplify right side
   2,147.77x = 5,716,273.73
5. Step 5: Solve for x
   x = 5,716,273.73/2,147.77
6. Step 6: Final answer
   x = 2,661.50