Finding the Fourth Proportional to 2,212.72, 3,319.56 and 731.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.72 : 3,319.56 = 731.88 : x
2. Step 2: Convert to fraction form
   2,212.72/3,319.56 = 731.88/x
3. Step 3: Cross multiply
   2,212.72x = 3,319.56 × 731.88
4. Step 4: Simplify right side
   2,212.72x = 2,429,519.57
5. Step 5: Solve for x
   x = 2,429,519.57/2,212.72
6. Step 6: Final answer
   x = 1,097.98