Finding the Fourth Proportional to 142,602.56, 196,783.08 and 78,936.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,602.56 : 196,783.08 = 78,936.56 : x
2. Step 2: Convert to fraction form
   142,602.56/196,783.08 = 78,936.56/x
3. Step 3: Cross multiply
   142,602.56x = 196,783.08 × 78,936.56
4. Step 4: Simplify right side
   142,602.56x = 15,533,379,401.40
5. Step 5: Solve for x
   x = 15,533,379,401.40/142,602.56
6. Step 6: Final answer
   x = 108,927.77