Finding the Fourth Proportional to 23,299.12, 32,151.81 and 12,688.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,299.12 : 32,151.81 = 12,688.72 : x
2. Step 2: Convert to fraction form
   23,299.12/32,151.81 = 12,688.72/x
3. Step 3: Cross multiply
   23,299.12x = 32,151.81 × 12,688.72
4. Step 4: Simplify right side
   23,299.12x = 407,965,314.58
5. Step 5: Solve for x
   x = 407,965,314.58/23,299.12
6. Step 6: Final answer
   x = 17,509.90