Finding the Fourth Proportional to 3,638.43, 5,020.86 and 2,147.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,638.43 : 5,020.86 = 2,147.22 : x
2. Step 2: Convert to fraction form
   3,638.43/5,020.86 = 2,147.22/x
3. Step 3: Cross multiply
   3,638.43x = 5,020.86 × 2,147.22
4. Step 4: Simplify right side
   3,638.43x = 10,780,891.01
5. Step 5: Solve for x
   x = 10,780,891.01/3,638.43
6. Step 6: Final answer
   x = 2,963.06