Finding the Fourth Proportional to 142,359.18, 196,438.41 and 78,688.14

Step by Step Solution

1. Step 1: Write the proportion equation
   142,359.18 : 196,438.41 = 78,688.14 : x
2. Step 2: Convert to fraction form
   142,359.18/196,438.41 = 78,688.14/x
3. Step 3: Cross multiply
   142,359.18x = 196,438.41 × 78,688.14
4. Step 4: Simplify right side
   142,359.18x = 15,457,373,107.46
5. Step 5: Solve for x
   x = 15,457,373,107.46/142,359.18
6. Step 6: Final answer
   x = 108,580.09