Finding the Fourth Proportional to 144,146.39, 198,910.55 and 83,707.09

Step by Step Solution

1. Step 1: Write the proportion equation
   144,146.39 : 198,910.55 = 83,707.09 : x
2. Step 2: Convert to fraction form
   144,146.39/198,910.55 = 83,707.09/x
3. Step 3: Cross multiply
   144,146.39x = 198,910.55 × 83,707.09
4. Step 4: Simplify right side
   144,146.39x = 16,650,223,022.79
5. Step 5: Solve for x
   x = 16,650,223,022.79/144,146.39
6. Step 6: Final answer
   x = 115,509.13