Finding the Fourth Proportional to 116,616.39, 161,021.03 and 91,078.17

Step by Step Solution

1. Step 1: Write the proportion equation
   116,616.39 : 161,021.03 = 91,078.17 : x
2. Step 2: Convert to fraction form
   116,616.39/161,021.03 = 91,078.17/x
3. Step 3: Cross multiply
   116,616.39x = 161,021.03 × 91,078.17
4. Step 4: Simplify right side
   116,616.39x = 14,665,500,288.52
5. Step 5: Solve for x
   x = 14,665,500,288.52/116,616.39
6. Step 6: Final answer
   x = 125,758.48