Finding the Fourth Proportional to 1,052.82, 1,578.96 and 436.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,052.82 : 1,578.96 = 436.70 : x
2. Step 2: Convert to fraction form
   1,052.82/1,578.96 = 436.70/x
3. Step 3: Cross multiply
   1,052.82x = 1,578.96 × 436.70
4. Step 4: Simplify right side
   1,052.82x = 689,531.83
5. Step 5: Solve for x
   x = 689,531.83/1,052.82
6. Step 6: Final answer
   x = 654.94