Finding the Fourth Proportional to 23,182.72, 31,990.83 and 13,621.12

Step by Step Solution

1. Step 1: Write the proportion equation
   23,182.72 : 31,990.83 = 13,621.12 : x
2. Step 2: Convert to fraction form
   23,182.72/31,990.83 = 13,621.12/x
3. Step 3: Cross multiply
   23,182.72x = 31,990.83 × 13,621.12
4. Step 4: Simplify right side
   23,182.72x = 435,750,934.33
5. Step 5: Solve for x
   x = 435,750,934.33/23,182.72
6. Step 6: Final answer
   x = 18,796.37