Finding the Fourth Proportional to 12,162.21, 16,767.19 and 7,683.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,162.21 : 16,767.19 = 7,683.72 : x
2. Step 2: Convert to fraction form
   12,162.21/16,767.19 = 7,683.72/x
3. Step 3: Cross multiply
   12,162.21x = 16,767.19 × 7,683.72
4. Step 4: Simplify right side
   12,162.21x = 128,834,393.15
5. Step 5: Solve for x
   x = 128,834,393.15/12,162.21
6. Step 6: Final answer
   x = 10,593.01