Finding the Fourth Proportional to 698.76, 1,046.72 and 322.98

Step by Step Solution

1. Step 1: Write the proportion equation
   698.76 : 1,046.72 = 322.98 : x
2. Step 2: Convert to fraction form
   698.76/1,046.72 = 322.98/x
3. Step 3: Cross multiply
   698.76x = 1,046.72 × 322.98
4. Step 4: Simplify right side
   698.76x = 338,064.89
5. Step 5: Solve for x
   x = 338,064.89/698.76
6. Step 6: Final answer
   x = 483.81