Finding the Fourth Proportional to 23,134.49, 31,979.40 and 20,641.31

Step by Step Solution

1. Step 1: Write the proportion equation
   23,134.49 : 31,979.40 = 20,641.31 : x
2. Step 2: Convert to fraction form
   23,134.49/31,979.40 = 20,641.31/x
3. Step 3: Cross multiply
   23,134.49x = 31,979.40 × 20,641.31
4. Step 4: Simplify right side
   23,134.49x = 660,096,709.01
5. Step 5: Solve for x
   x = 660,096,709.01/23,134.49
6. Step 6: Final answer
   x = 28,533.01