Finding the Fourth Proportional to 139,236, 192,145.68 and 79,631.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,236 : 192,145.68 = 79,631.52 : x
2. Step 2: Convert to fraction form
   139,236/192,145.68 = 79,631.52/x
3. Step 3: Cross multiply
   139,236x = 192,145.68 × 79,631.52
4. Step 4: Simplify right side
   139,236x = 15,300,852,559.83
5. Step 5: Solve for x
   x = 15,300,852,559.83/139,236
6. Step 6: Final answer
   x = 109,891.50