Finding the Fourth Proportional to 72,725.16, 109,087.89 and 20,134.80

Step by Step Solution

1. Step 1: Write the proportion equation
   72,725.16 : 109,087.89 = 20,134.80 : x
2. Step 2: Convert to fraction form
   72,725.16/109,087.89 = 20,134.80/x
3. Step 3: Cross multiply
   72,725.16x = 109,087.89 × 20,134.80
4. Step 4: Simplify right side
   72,725.16x = 2,196,462,847.57
5. Step 5: Solve for x
   x = 2,196,462,847.57/72,725.16
6. Step 6: Final answer
   x = 30,202.24