Finding the Fourth Proportional to 2,136.72, 3,199.33 and 2,013.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,136.72 : 3,199.33 = 2,013.88 : x
2. Step 2: Convert to fraction form
   2,136.72/3,199.33 = 2,013.88/x
3. Step 3: Cross multiply
   2,136.72x = 3,199.33 × 2,013.88
4. Step 4: Simplify right side
   2,136.72x = 6,443,066.70
5. Step 5: Solve for x
   x = 6,443,066.70/2,136.72
6. Step 6: Final answer
   x = 3,015.40