Finding the Fourth Proportional to 2,136.50, 2,948.55 and 1,205.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,136.50 : 2,948.55 = 1,205.18 : x
2. Step 2: Convert to fraction form
   2,136.50/2,948.55 = 1,205.18/x
3. Step 3: Cross multiply
   2,136.50x = 2,948.55 × 1,205.18
4. Step 4: Simplify right side
   2,136.50x = 3,553,533.49
5. Step 5: Solve for x
   x = 3,553,533.49/2,136.50
6. Step 6: Final answer
   x = 1,663.25