Finding the Fourth Proportional to 139,729.33, 192,825.90 and 78,467

Step by Step Solution

1. Step 1: Write the proportion equation
   139,729.33 : 192,825.90 = 78,467 : x
2. Step 2: Convert to fraction form
   139,729.33/192,825.90 = 78,467/x
3. Step 3: Cross multiply
   139,729.33x = 192,825.90 × 78,467
4. Step 4: Simplify right side
   139,729.33x = 15,130,469,895.30
5. Step 5: Solve for x
   x = 15,130,469,895.30/139,729.33
6. Step 6: Final answer
   x = 108,284.14