Finding the Fourth Proportional to 142,152.14, 196,168.68 and 78,488.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,152.14 : 196,168.68 = 78,488.56 : x
2. Step 2: Convert to fraction form
   142,152.14/196,168.68 = 78,488.56/x
3. Step 3: Cross multiply
   142,152.14x = 196,168.68 × 78,488.56
4. Step 4: Simplify right side
   142,152.14x = 15,396,997,210.30
5. Step 5: Solve for x
   x = 15,396,997,210.30/142,152.14
6. Step 6: Final answer
   x = 108,313.51