Finding the Fourth Proportional to 1,026.89, 1,540.59 and 441.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,026.89 : 1,540.59 = 441.95 : x
2. Step 2: Convert to fraction form
   1,026.89/1,540.59 = 441.95/x
3. Step 3: Cross multiply
   1,026.89x = 1,540.59 × 441.95
4. Step 4: Simplify right side
   1,026.89x = 680,856.05
5. Step 5: Solve for x
   x = 680,856.05/1,026.89
6. Step 6: Final answer
   x = 663.03