Finding the Fourth Proportional to 142,308.09, 196,379.69 and 81,898.14

Step by Step Solution

1. Step 1: Write the proportion equation
   142,308.09 : 196,379.69 = 81,898.14 : x
2. Step 2: Convert to fraction form
   142,308.09/196,379.69 = 81,898.14/x
3. Step 3: Cross multiply
   142,308.09x = 196,379.69 × 81,898.14
4. Step 4: Simplify right side
   142,308.09x = 16,083,131,027.75
5. Step 5: Solve for x
   x = 16,083,131,027.75/142,308.09
6. Step 6: Final answer
   x = 113,016.28