Finding the Fourth Proportional to 12,172.82, 16,806.76 and 7,637.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,172.82 : 16,806.76 = 7,637.39 : x
2. Step 2: Convert to fraction form
   12,172.82/16,806.76 = 7,637.39/x
3. Step 3: Cross multiply
   12,172.82x = 16,806.76 × 7,637.39
4. Step 4: Simplify right side
   12,172.82x = 128,359,740.65
5. Step 5: Solve for x
   x = 128,359,740.65/12,172.82
6. Step 6: Final answer
   x = 10,544.79