Finding the Fourth Proportional to 1,056.30, 1,584.72 and 325.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.30 : 1,584.72 = 325.98 : x
2. Step 2: Convert to fraction form
   1,056.30/1,584.72 = 325.98/x
3. Step 3: Cross multiply
   1,056.30x = 1,584.72 × 325.98
4. Step 4: Simplify right side
   1,056.30x = 516,587.03
5. Step 5: Solve for x
   x = 516,587.03/1,056.30
6. Step 6: Final answer
   x = 489.05