Finding the Fourth Proportional to 23,688.10, 32,693.79 and 14,128.57

Step by Step Solution

1. Step 1: Write the proportion equation
   23,688.10 : 32,693.79 = 14,128.57 : x
2. Step 2: Convert to fraction form
   23,688.10/32,693.79 = 14,128.57/x
3. Step 3: Cross multiply
   23,688.10x = 32,693.79 × 14,128.57
4. Step 4: Simplify right side
   23,688.10x = 461,916,500.58
5. Step 5: Solve for x
   x = 461,916,500.58/23,688.10
6. Step 6: Final answer
   x = 19,499.94