Finding the Fourth Proportional to 1,281.98, 1,768.95 and 722.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,281.98 : 1,768.95 = 722.34 : x
2. Step 2: Convert to fraction form
   1,281.98/1,768.95 = 722.34/x
3. Step 3: Cross multiply
   1,281.98x = 1,768.95 × 722.34
4. Step 4: Simplify right side
   1,281.98x = 1,277,783.34
5. Step 5: Solve for x
   x = 1,277,783.34/1,281.98
6. Step 6: Final answer
   x = 996.72