Finding the Fourth Proportional to 728.82, 1,091.72 and 362.50

Step by Step Solution

1. Step 1: Write the proportion equation
   728.82 : 1,091.72 = 362.50 : x
2. Step 2: Convert to fraction form
   728.82/1,091.72 = 362.50/x
3. Step 3: Cross multiply
   728.82x = 1,091.72 × 362.50
4. Step 4: Simplify right side
   728.82x = 395,748.50
5. Step 5: Solve for x
   x = 395,748.50/728.82
6. Step 6: Final answer
   x = 543.00