Finding the Fourth Proportional to 1,589.69, 2,193.72 and 891.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,589.69 : 2,193.72 = 891.06 : x
2. Step 2: Convert to fraction form
   1,589.69/2,193.72 = 891.06/x
3. Step 3: Cross multiply
   1,589.69x = 2,193.72 × 891.06
4. Step 4: Simplify right side
   1,589.69x = 1,954,736.14
5. Step 5: Solve for x
   x = 1,954,736.14/1,589.69
6. Step 6: Final answer
   x = 1,229.64