Finding the Fourth Proportional to 21,991.52, 33,016.46 and 21,233.36

Step by Step Solution

1. Step 1: Write the proportion equation
   21,991.52 : 33,016.46 = 21,233.36 : x
2. Step 2: Convert to fraction form
   21,991.52/33,016.46 = 21,233.36/x
3. Step 3: Cross multiply
   21,991.52x = 33,016.46 × 21,233.36
4. Step 4: Simplify right side
   21,991.52x = 701,050,109.86
5. Step 5: Solve for x
   x = 701,050,109.86/21,991.52
6. Step 6: Final answer
   x = 31,878.21