Finding the Fourth Proportional to 142,164.63, 196,184.84 and 78,500.79

Step by Step Solution

1. Step 1: Write the proportion equation
   142,164.63 : 196,184.84 = 78,500.79 : x
2. Step 2: Convert to fraction form
   142,164.63/196,184.84 = 78,500.79/x
3. Step 3: Cross multiply
   142,164.63x = 196,184.84 × 78,500.79
4. Step 4: Simplify right side
   142,164.63x = 15,400,664,533.52
5. Step 5: Solve for x
   x = 15,400,664,533.52/142,164.63
6. Step 6: Final answer
   x = 108,329.79