Finding the Fourth Proportional to 142,289.02, 196,362.78 and 78,630.82

Step by Step Solution

1. Step 1: Write the proportion equation
   142,289.02 : 196,362.78 = 78,630.82 : x
2. Step 2: Convert to fraction form
   142,289.02/196,362.78 = 78,630.82/x
3. Step 3: Cross multiply
   142,289.02x = 196,362.78 × 78,630.82
4. Step 4: Simplify right side
   142,289.02x = 15,440,166,408.88
5. Step 5: Solve for x
   x = 15,440,166,408.88/142,289.02
6. Step 6: Final answer
   x = 108,512.70