Finding the Fourth Proportional to 139,488.12, 192,479.22 and 82,888.60

Step by Step Solution

1. Step 1: Write the proportion equation
   139,488.12 : 192,479.22 = 82,888.60 : x
2. Step 2: Convert to fraction form
   139,488.12/192,479.22 = 82,888.60/x
3. Step 3: Cross multiply
   139,488.12x = 192,479.22 × 82,888.60
4. Step 4: Simplify right side
   139,488.12x = 15,954,333,074.89
5. Step 5: Solve for x
   x = 15,954,333,074.89/139,488.12
6. Step 6: Final answer
   x = 114,377.72