Finding the Fourth Proportional to 1,052.84, 1,578.96 and 436.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,052.84 : 1,578.96 = 436.72 : x
2. Step 2: Convert to fraction form
   1,052.84/1,578.96 = 436.72/x
3. Step 3: Cross multiply
   1,052.84x = 1,578.96 × 436.72
4. Step 4: Simplify right side
   1,052.84x = 689,563.41
5. Step 5: Solve for x
   x = 689,563.41/1,052.84
6. Step 6: Final answer
   x = 654.96