Finding the Fourth Proportional to 1,096.69, 1,638.60 and 1,058.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.69 : 1,638.60 = 1,058.41 : x
2. Step 2: Convert to fraction form
   1,096.69/1,638.60 = 1,058.41/x
3. Step 3: Cross multiply
   1,096.69x = 1,638.60 × 1,058.41
4. Step 4: Simplify right side
   1,096.69x = 1,734,310.63
5. Step 5: Solve for x
   x = 1,734,310.63/1,096.69
6. Step 6: Final answer
   x = 1,581.40