Finding the Fourth Proportional to 142,448.63, 196,584.25 and 78,786.89

Step by Step Solution

1. Step 1: Write the proportion equation
   142,448.63 : 196,584.25 = 78,786.89 : x
2. Step 2: Convert to fraction form
   142,448.63/196,584.25 = 78,786.89/x
3. Step 3: Cross multiply
   142,448.63x = 196,584.25 × 78,786.89
4. Step 4: Simplify right side
   142,448.63x = 15,488,261,165.00
5. Step 5: Solve for x
   x = 15,488,261,165.00/142,448.63
6. Step 6: Final answer
   x = 108,728.75