Finding the Fourth Proportional to 139,697.20, 192,808.71 and 79,273.46

Step by Step Solution

1. Step 1: Write the proportion equation
   139,697.20 : 192,808.71 = 79,273.46 : x
2. Step 2: Convert to fraction form
   139,697.20/192,808.71 = 79,273.46/x
3. Step 3: Cross multiply
   139,697.20x = 192,808.71 × 79,273.46
4. Step 4: Simplify right side
   139,697.20x = 15,284,614,041.86
5. Step 5: Solve for x
   x = 15,284,614,041.86/139,697.20
6. Step 6: Final answer
   x = 109,412.46