Finding the Fourth Proportional to 142,558.58, 196,728.31 and 82,129.07

Step by Step Solution

1. Step 1: Write the proportion equation
   142,558.58 : 196,728.31 = 82,129.07 : x
2. Step 2: Convert to fraction form
   142,558.58/196,728.31 = 82,129.07/x
3. Step 3: Cross multiply
   142,558.58x = 196,728.31 × 82,129.07
4. Step 4: Simplify right side
   142,558.58x = 16,157,111,954.01
5. Step 5: Solve for x
   x = 16,157,111,954.01/142,558.58
6. Step 6: Final answer
   x = 113,336.65