Finding the Fourth Proportional to 2,007.20, 2,769.86 and 1,098.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.20 : 2,769.86 = 1,098.71 : x
2. Step 2: Convert to fraction form
   2,007.20/2,769.86 = 1,098.71/x
3. Step 3: Cross multiply
   2,007.20x = 2,769.86 × 1,098.71
4. Step 4: Simplify right side
   2,007.20x = 3,043,261.84
5. Step 5: Solve for x
   x = 3,043,261.84/2,007.20
6. Step 6: Final answer
   x = 1,516.17