Finding the Fourth Proportional to 1,128.69, 1,692.75 and 634.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.69 : 1,692.75 = 634.50 : x
2. Step 2: Convert to fraction form
   1,128.69/1,692.75 = 634.50/x
3. Step 3: Cross multiply
   1,128.69x = 1,692.75 × 634.50
4. Step 4: Simplify right side
   1,128.69x = 1,074,049.88
5. Step 5: Solve for x
   x = 1,074,049.88/1,128.69
6. Step 6: Final answer
   x = 951.59