Finding the Fourth Proportional to 72,723.94, 109,073.76 and 20,138.74

Step by Step Solution

1. Step 1: Write the proportion equation
   72,723.94 : 109,073.76 = 20,138.74 : x
2. Step 2: Convert to fraction form
   72,723.94/109,073.76 = 20,138.74/x
3. Step 3: Cross multiply
   72,723.94x = 109,073.76 × 20,138.74
4. Step 4: Simplify right side
   72,723.94x = 2,196,608,093.46
5. Step 5: Solve for x
   x = 2,196,608,093.46/72,723.94
6. Step 6: Final answer
   x = 30,204.75