Finding the Fourth Proportional to 2,219.76, 3,328.82 and 738.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.76 : 3,328.82 = 738.72 : x
2. Step 2: Convert to fraction form
   2,219.76/3,328.82 = 738.72/x
3. Step 3: Cross multiply
   2,219.76x = 3,328.82 × 738.72
4. Step 4: Simplify right side
   2,219.76x = 2,459,065.91
5. Step 5: Solve for x
   x = 2,459,065.91/2,219.76
6. Step 6: Final answer
   x = 1,107.81