Finding the Fourth Proportional to 139,674, 192,716.51 and 82,315.61

Step by Step Solution

1. Step 1: Write the proportion equation
   139,674 : 192,716.51 = 82,315.61 : x
2. Step 2: Convert to fraction form
   139,674/192,716.51 = 82,315.61/x
3. Step 3: Cross multiply
   139,674x = 192,716.51 × 82,315.61
4. Step 4: Simplify right side
   139,674x = 15,863,575,702.56
5. Step 5: Solve for x
   x = 15,863,575,702.56/139,674
6. Step 6: Final answer
   x = 113,575.72