Finding the Fourth Proportional to 1,128.50, 1,692.76 and 444.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.50 : 1,692.76 = 444.50 : x
2. Step 2: Convert to fraction form
   1,128.50/1,692.76 = 444.50/x
3. Step 3: Cross multiply
   1,128.50x = 1,692.76 × 444.50
4. Step 4: Simplify right side
   1,128.50x = 752,431.82
5. Step 5: Solve for x
   x = 752,431.82/1,128.50
6. Step 6: Final answer
   x = 666.75