Finding the Fourth Proportional to 23,128.38, 31,917.04 and 13,056.73

Step by Step Solution

1. Step 1: Write the proportion equation
   23,128.38 : 31,917.04 = 13,056.73 : x
2. Step 2: Convert to fraction form
   23,128.38/31,917.04 = 13,056.73/x
3. Step 3: Cross multiply
   23,128.38x = 31,917.04 × 13,056.73
4. Step 4: Simplify right side
   23,128.38x = 416,732,278.52
5. Step 5: Solve for x
   x = 416,732,278.52/23,128.38
6. Step 6: Final answer
   x = 18,018.22