Finding the Fourth Proportional to 1,327.29, 1,989.56 and 505.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,327.29 : 1,989.56 = 505.34 : x
2. Step 2: Convert to fraction form
   1,327.29/1,989.56 = 505.34/x
3. Step 3: Cross multiply
   1,327.29x = 1,989.56 × 505.34
4. Step 4: Simplify right side
   1,327.29x = 1,005,403.03
5. Step 5: Solve for x
   x = 1,005,403.03/1,327.29
6. Step 6: Final answer
   x = 757.49