Finding the Fourth Proportional to 7,151.16, 10,722.77 and 3,638.98

Step by Step Solution

1. Step 1: Write the proportion equation
   7,151.16 : 10,722.77 = 3,638.98 : x
2. Step 2: Convert to fraction form
   7,151.16/10,722.77 = 3,638.98/x
3. Step 3: Cross multiply
   7,151.16x = 10,722.77 × 3,638.98
4. Step 4: Simplify right side
   7,151.16x = 39,019,945.57
5. Step 5: Solve for x
   x = 39,019,945.57/7,151.16
6. Step 6: Final answer
   x = 5,456.45