Finding the Fourth Proportional to 3,638.88, 5,020.56 and 2,066.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,638.88 : 5,020.56 = 2,066.96 : x
2. Step 2: Convert to fraction form
   3,638.88/5,020.56 = 2,066.96/x
3. Step 3: Cross multiply
   3,638.88x = 5,020.56 × 2,066.96
4. Step 4: Simplify right side
   3,638.88x = 10,377,296.70
5. Step 5: Solve for x
   x = 10,377,296.70/3,638.88
6. Step 6: Final answer
   x = 2,851.78