Finding the Fourth Proportional to 1,441.98, 1,989.93 and 820.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.98 : 1,989.93 = 820.98 : x
2. Step 2: Convert to fraction form
   1,441.98/1,989.93 = 820.98/x
3. Step 3: Cross multiply
   1,441.98x = 1,989.93 × 820.98
4. Step 4: Simplify right side
   1,441.98x = 1,633,692.73
5. Step 5: Solve for x
   x = 1,633,692.73/1,441.98
6. Step 6: Final answer
   x = 1,132.95