Finding the Fourth Proportional to 72,745.94, 109,106.76 and 20,160.74

Step by Step Solution

1. Step 1: Write the proportion equation
   72,745.94 : 109,106.76 = 20,160.74 : x
2. Step 2: Convert to fraction form
   72,745.94/109,106.76 = 20,160.74/x
3. Step 3: Cross multiply
   72,745.94x = 109,106.76 × 20,160.74
4. Step 4: Simplify right side
   72,745.94x = 2,199,673,020.60
5. Step 5: Solve for x
   x = 2,199,673,020.60/72,745.94
6. Step 6: Final answer
   x = 30,237.74