Finding the Fourth Proportional to 72,727.71, 109,091.39 and 20,137.02

Step by Step Solution

1. Step 1: Write the proportion equation
   72,727.71 : 109,091.39 = 20,137.02 : x
2. Step 2: Convert to fraction form
   72,727.71/109,091.39 = 20,137.02/x
3. Step 3: Cross multiply
   72,727.71x = 109,091.39 × 20,137.02
4. Step 4: Simplify right side
   72,727.71x = 2,196,775,401.57
5. Step 5: Solve for x
   x = 2,196,775,401.57/72,727.71
6. Step 6: Final answer
   x = 30,205.48