Finding the Fourth Proportional to 3,723.01, 5,136.44 and 2,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,723.01 : 5,136.44 = 2,128.50 : x
2. Step 2: Convert to fraction form
   3,723.01/5,136.44 = 2,128.50/x
3. Step 3: Cross multiply
   3,723.01x = 5,136.44 × 2,128.50
4. Step 4: Simplify right side
   3,723.01x = 10,932,922.33
5. Step 5: Solve for x
   x = 10,932,922.33/3,723.01
6. Step 6: Final answer
   x = 2,936.58