Finding the Fourth Proportional to 1,281.56, 1,768.43 and 722.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,281.56 : 1,768.43 = 722.02 : x
2. Step 2: Convert to fraction form
   1,281.56/1,768.43 = 722.02/x
3. Step 3: Cross multiply
   1,281.56x = 1,768.43 × 722.02
4. Step 4: Simplify right side
   1,281.56x = 1,276,841.83
5. Step 5: Solve for x
   x = 1,276,841.83/1,281.56
6. Step 6: Final answer
   x = 996.32