Finding the Fourth Proportional to 142,640.97, 196,855.61 and 78,984.69

Step by Step Solution

1. Step 1: Write the proportion equation
   142,640.97 : 196,855.61 = 78,984.69 : x
2. Step 2: Convert to fraction form
   142,640.97/196,855.61 = 78,984.69/x
3. Step 3: Cross multiply
   142,640.97x = 196,855.61 × 78,984.69
4. Step 4: Simplify right side
   142,640.97x = 15,548,579,330.61
5. Step 5: Solve for x
   x = 15,548,579,330.61/142,640.97
6. Step 6: Final answer
   x = 109,005.00