Finding the Fourth Proportional to 142,346.27, 196,430.18 and 78,680.27

Step by Step Solution

1. Step 1: Write the proportion equation
   142,346.27 : 196,430.18 = 78,680.27 : x
2. Step 2: Convert to fraction form
   142,346.27/196,430.18 = 78,680.27/x
3. Step 3: Cross multiply
   142,346.27x = 196,430.18 × 78,680.27
4. Step 4: Simplify right side
   142,346.27x = 15,455,178,223.00
5. Step 5: Solve for x
   x = 15,455,178,223.00/142,346.27
6. Step 6: Final answer
   x = 108,574.53