Finding the Fourth Proportional to 1,098, 1,639.04 and 1,016.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,098 : 1,639.04 = 1,016.71 : x
2. Step 2: Convert to fraction form
   1,098/1,639.04 = 1,016.71/x
3. Step 3: Cross multiply
   1,098x = 1,639.04 × 1,016.71
4. Step 4: Simplify right side
   1,098x = 1,666,419.18
5. Step 5: Solve for x
   x = 1,666,419.18/1,098
6. Step 6: Final answer
   x = 1,517.69