Finding the Fourth Proportional to 142,499.40, 196,514.69 and 106,280.79

Step by Step Solution

1. Step 1: Write the proportion equation
   142,499.40 : 196,514.69 = 106,280.79 : x
2. Step 2: Convert to fraction form
   142,499.40/196,514.69 = 106,280.79/x
3. Step 3: Cross multiply
   142,499.40x = 196,514.69 × 106,280.79
4. Step 4: Simplify right side
   142,499.40x = 20,885,735,968.40
5. Step 5: Solve for x
   x = 20,885,735,968.40/142,499.40
6. Step 6: Final answer
   x = 146,567.19