Finding the Fourth Proportional to 139,162.89, 192,144.65 and 85,519.83

Step by Step Solution

1. Step 1: Write the proportion equation
   139,162.89 : 192,144.65 = 85,519.83 : x
2. Step 2: Convert to fraction form
   139,162.89/192,144.65 = 85,519.83/x
3. Step 3: Cross multiply
   139,162.89x = 192,144.65 × 85,519.83
4. Step 4: Simplify right side
   139,162.89x = 16,432,177,375.81
5. Step 5: Solve for x
   x = 16,432,177,375.81/139,162.89
6. Step 6: Final answer
   x = 118,078.73