Finding the Fourth Proportional to 142,392.37, 196,505.42 and 78,732.45

Step by Step Solution

1. Step 1: Write the proportion equation
   142,392.37 : 196,505.42 = 78,732.45 : x
2. Step 2: Convert to fraction form
   142,392.37/196,505.42 = 78,732.45/x
3. Step 3: Cross multiply
   142,392.37x = 196,505.42 × 78,732.45
4. Step 4: Simplify right side
   142,392.37x = 15,471,353,154.88
5. Step 5: Solve for x
   x = 15,471,353,154.88/142,392.37
6. Step 6: Final answer
   x = 108,652.96