Finding the Fourth Proportional to 2,136.89, 2,948.88 and 1,205.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,136.89 : 2,948.88 = 1,205.39 : x
2. Step 2: Convert to fraction form
   2,136.89/2,948.88 = 1,205.39/x
3. Step 3: Cross multiply
   2,136.89x = 2,948.88 × 1,205.39
4. Step 4: Simplify right side
   2,136.89x = 3,554,550.46
5. Step 5: Solve for x
   x = 3,554,550.46/2,136.89
6. Step 6: Final answer
   x = 1,663.42