Finding the Fourth Proportional to 23,171.06, 31,976.56 and 13,098.90

Step by Step Solution

1. Step 1: Write the proportion equation
   23,171.06 : 31,976.56 = 13,098.90 : x
2. Step 2: Convert to fraction form
   23,171.06/31,976.56 = 13,098.90/x
3. Step 3: Cross multiply
   23,171.06x = 31,976.56 × 13,098.90
4. Step 4: Simplify right side
   23,171.06x = 418,857,761.78
5. Step 5: Solve for x
   x = 418,857,761.78/23,171.06
6. Step 6: Final answer
   x = 18,076.76