Finding the Fourth Proportional to 1,327.28, 1,981.17 and 1,171.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,327.28 : 1,981.17 = 1,171.59 : x
2. Step 2: Convert to fraction form
   1,327.28/1,981.17 = 1,171.59/x
3. Step 3: Cross multiply
   1,327.28x = 1,981.17 × 1,171.59
4. Step 4: Simplify right side
   1,327.28x = 2,321,118.96
5. Step 5: Solve for x
   x = 2,321,118.96/1,327.28
6. Step 6: Final answer
   x = 1,748.79