Finding the Fourth Proportional to 798.50, 1,196.67 and 386.82

Step by Step Solution

1. Step 1: Write the proportion equation
   798.50 : 1,196.67 = 386.82 : x
2. Step 2: Convert to fraction form
   798.50/1,196.67 = 386.82/x
3. Step 3: Cross multiply
   798.50x = 1,196.67 × 386.82
4. Step 4: Simplify right side
   798.50x = 462,895.89
5. Step 5: Solve for x
   x = 462,895.89/798.50
6. Step 6: Final answer
   x = 579.70