Finding the Fourth Proportional to 6,622.61, 9,139.23 and 3,638.52

Step by Step Solution

1. Step 1: Write the proportion equation
   6,622.61 : 9,139.23 = 3,638.52 : x
2. Step 2: Convert to fraction form
   6,622.61/9,139.23 = 3,638.52/x
3. Step 3: Cross multiply
   6,622.61x = 9,139.23 × 3,638.52
4. Step 4: Simplify right side
   6,622.61x = 33,253,271.14
5. Step 5: Solve for x
   x = 33,253,271.14/6,622.61
6. Step 6: Final answer
   x = 5,021.17