Finding the Fourth Proportional to 139,607.82, 192,615.30 and 79,173.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,607.82 : 192,615.30 = 79,173.72 : x
2. Step 2: Convert to fraction form
   139,607.82/192,615.30 = 79,173.72/x
3. Step 3: Cross multiply
   139,607.82x = 192,615.30 × 79,173.72
4. Step 4: Simplify right side
   139,607.82x = 15,250,069,829.92
5. Step 5: Solve for x
   x = 15,250,069,829.92/139,607.82
6. Step 6: Final answer
   x = 109,235.07