Finding the Fourth Proportional to 72,747.94, 109,109.76 and 20,162.74

Step by Step Solution

1. Step 1: Write the proportion equation
   72,747.94 : 109,109.76 = 20,162.74 : x
2. Step 2: Convert to fraction form
   72,747.94/109,109.76 = 20,162.74/x
3. Step 3: Cross multiply
   72,747.94x = 109,109.76 × 20,162.74
4. Step 4: Simplify right side
   72,747.94x = 2,199,951,722.34
5. Step 5: Solve for x
   x = 2,199,951,722.34/72,747.94
6. Step 6: Final answer
   x = 30,240.74