Finding the Fourth Proportional to 138,797.57, 191,863.46 and 123,838.49

Step by Step Solution

1. Step 1: Write the proportion equation
   138,797.57 : 191,863.46 = 123,838.49 : x
2. Step 2: Convert to fraction form
   138,797.57/191,863.46 = 123,838.49/x
3. Step 3: Cross multiply
   138,797.57x = 191,863.46 × 123,838.49
4. Step 4: Simplify right side
   138,797.57x = 23,760,081,961.83
5. Step 5: Solve for x
   x = 23,760,081,961.83/138,797.57
6. Step 6: Final answer
   x = 171,185.14