Finding the Fourth Proportional to 1,281.56, 1,768.55 and 692.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,281.56 : 1,768.55 = 692.09 : x
2. Step 2: Convert to fraction form
   1,281.56/1,768.55 = 692.09/x
3. Step 3: Cross multiply
   1,281.56x = 1,768.55 × 692.09
4. Step 4: Simplify right side
   1,281.56x = 1,223,994.50
5. Step 5: Solve for x
   x = 1,223,994.50/1,281.56
6. Step 6: Final answer
   x = 955.09