Finding the Fourth Proportional to 1,706.69, 2,355.15 and 998.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,706.69 : 2,355.15 = 998.55 : x
2. Step 2: Convert to fraction form
   1,706.69/2,355.15 = 998.55/x
3. Step 3: Cross multiply
   1,706.69x = 2,355.15 × 998.55
4. Step 4: Simplify right side
   1,706.69x = 2,351,735.03
5. Step 5: Solve for x
   x = 2,351,735.03/1,706.69
6. Step 6: Final answer
   x = 1,377.95