Finding the Fourth Proportional to 2,136.55, 3,206.82 and 1,316.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,136.55 : 3,206.82 = 1,316.42 : x
2. Step 2: Convert to fraction form
   2,136.55/3,206.82 = 1,316.42/x
3. Step 3: Cross multiply
   2,136.55x = 3,206.82 × 1,316.42
4. Step 4: Simplify right side
   2,136.55x = 4,221,521.98
5. Step 5: Solve for x
   x = 4,221,521.98/2,136.55
6. Step 6: Final answer
   x = 1,975.86