Finding the Fourth Proportional to 2,151.54, 3,222.18 and 1,327.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.54 : 3,222.18 = 1,327.31 : x
2. Step 2: Convert to fraction form
   2,151.54/3,222.18 = 1,327.31/x
3. Step 3: Cross multiply
   2,151.54x = 3,222.18 × 1,327.31
4. Step 4: Simplify right side
   2,151.54x = 4,276,836.77
5. Step 5: Solve for x
   x = 4,276,836.77/2,151.54
6. Step 6: Final answer
   x = 1,987.81