Finding the Fourth Proportional to 31,667.68, 43,721.74 and 20,342.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,667.68 : 43,721.74 = 20,342.06 : x
2. Step 2: Convert to fraction form
   31,667.68/43,721.74 = 20,342.06/x
3. Step 3: Cross multiply
   31,667.68x = 43,721.74 × 20,342.06
4. Step 4: Simplify right side
   31,667.68x = 889,390,258.38
5. Step 5: Solve for x
   x = 889,390,258.38/31,667.68
6. Step 6: Final answer
   x = 28,085.11