Finding the Fourth Proportional to 1,039.72, 1,558.46 and 552.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.72 : 1,558.46 = 552.28 : x
2. Step 2: Convert to fraction form
   1,039.72/1,558.46 = 552.28/x
3. Step 3: Cross multiply
   1,039.72x = 1,558.46 × 552.28
4. Step 4: Simplify right side
   1,039.72x = 860,706.29
5. Step 5: Solve for x
   x = 860,706.29/1,039.72
6. Step 6: Final answer
   x = 827.83