Finding the Fourth Proportional to 72,016.40, 107,992.20 and 32,553.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,016.40 : 107,992.20 = 32,553.20 : x
2. Step 2: Convert to fraction form
   72,016.40/107,992.20 = 32,553.20/x
3. Step 3: Cross multiply
   72,016.40x = 107,992.20 × 32,553.20
4. Step 4: Simplify right side
   72,016.40x = 3,515,491,685.04
5. Step 5: Solve for x
   x = 3,515,491,685.04/72,016.40
6. Step 6: Final answer
   x = 48,815.15