Finding the Fourth Proportional to 139,833.98, 192,984.83 and 85,383.15

Step by Step Solution

1. Step 1: Write the proportion equation
   139,833.98 : 192,984.83 = 85,383.15 : x
2. Step 2: Convert to fraction form
   139,833.98/192,984.83 = 85,383.15/x
3. Step 3: Cross multiply
   139,833.98x = 192,984.83 × 85,383.15
4. Step 4: Simplify right side
   139,833.98x = 16,477,651,857.19
5. Step 5: Solve for x
   x = 16,477,651,857.19/139,833.98
6. Step 6: Final answer
   x = 117,837.25