Finding the Fourth Proportional to 2,882.58, 3,978.90 and 2,136.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,882.58 : 3,978.90 = 2,136.30 : x
2. Step 2: Convert to fraction form
   2,882.58/3,978.90 = 2,136.30/x
3. Step 3: Cross multiply
   2,882.58x = 3,978.90 × 2,136.30
4. Step 4: Simplify right side
   2,882.58x = 8,500,124.07
5. Step 5: Solve for x
   x = 8,500,124.07/2,882.58
6. Step 6: Final answer
   x = 2,948.79