Finding the Fourth Proportional to 142,308.42, 196,398.06 and 78,658.62

Step by Step Solution

1. Step 1: Write the proportion equation
   142,308.42 : 196,398.06 = 78,658.62 : x
2. Step 2: Convert to fraction form
   142,308.42/196,398.06 = 78,658.62/x
3. Step 3: Cross multiply
   142,308.42x = 196,398.06 × 78,658.62
4. Step 4: Simplify right side
   142,308.42x = 15,448,400,370.28
5. Step 5: Solve for x
   x = 15,448,400,370.28/142,308.42
6. Step 6: Final answer
   x = 108,555.77