Finding the Fourth Proportional to 139,398.38, 192,018 and 112,465.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,398.38 : 192,018 = 112,465.52 : x
2. Step 2: Convert to fraction form
   139,398.38/192,018 = 112,465.52/x
3. Step 3: Cross multiply
   139,398.38x = 192,018 × 112,465.52
4. Step 4: Simplify right side
   139,398.38x = 21,595,404,219.36
5. Step 5: Solve for x
   x = 21,595,404,219.36/139,398.38
6. Step 6: Final answer
   x = 154,918.62