Finding the Fourth Proportional to 1,019.15, 1,527.98 and 325.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.15 : 1,527.98 = 325.42 : x
2. Step 2: Convert to fraction form
   1,019.15/1,527.98 = 325.42/x
3. Step 3: Cross multiply
   1,019.15x = 1,527.98 × 325.42
4. Step 4: Simplify right side
   1,019.15x = 497,229.80
5. Step 5: Solve for x
   x = 497,229.80/1,019.15
6. Step 6: Final answer
   x = 487.89