Finding the Fourth Proportional to 3,638.67, 5,021.22 and 2,066.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,638.67 : 5,021.22 = 2,066.59 : x
2. Step 2: Convert to fraction form
   3,638.67/5,021.22 = 2,066.59/x
3. Step 3: Cross multiply
   3,638.67x = 5,021.22 × 2,066.59
4. Step 4: Simplify right side
   3,638.67x = 10,376,803.04
5. Step 5: Solve for x
   x = 10,376,803.04/3,638.67
6. Step 6: Final answer
   x = 2,851.81