Finding the Fourth Proportional to 1,141.39, 1,573.59 and 891.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.39 : 1,573.59 = 891.73 : x
2. Step 2: Convert to fraction form
   1,141.39/1,573.59 = 891.73/x
3. Step 3: Cross multiply
   1,141.39x = 1,573.59 × 891.73
4. Step 4: Simplify right side
   1,141.39x = 1,403,217.41
5. Step 5: Solve for x
   x = 1,403,217.41/1,141.39
6. Step 6: Final answer
   x = 1,229.39