Finding the Fourth Proportional to 1,052.43, 1,578.72 and 322.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,052.43 : 1,578.72 = 322.52 : x
2. Step 2: Convert to fraction form
   1,052.43/1,578.72 = 322.52/x
3. Step 3: Cross multiply
   1,052.43x = 1,578.72 × 322.52
4. Step 4: Simplify right side
   1,052.43x = 509,168.77
5. Step 5: Solve for x
   x = 509,168.77/1,052.43
6. Step 6: Final answer
   x = 483.80